Dynamic information storage or retrieval inventions

20090279393 - Playing data from an optical media drive: Example embodiments provide various techniques for playing data from an optical media drive. The optical media drive may detect certain media access information for use in accessing optical media. This media access information is stored in a memory that is configured to retain the media access information after the optical... Agent: Schwegman, Lundberg & Woessner/apple

20090279394 - Disc processing device and control method for disc processing device: The effect of detection errors when detecting if a disc recording medium is in a disc drive is eliminated. A control unit 17 detects if an optical disc 11 was supplied to an optical disc drive 13 based on the operation of the transportation unit 16, causes the optical disc... Agent: Townsend And Townsend And Crew, LLP

20090279395 - Optical disk drives and method for controlling track-seeking for optical disk drives: The invention provides an optical disk drive. The optical disk drive comprises a pickup head, a seek control device, a lens vision characteristic decoder, and an anti lens shift device. The pickup head comprises a sled and a lens for projecting a beam on a disk. The seek control device... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20090279396 - Misjudgment correction circuit and optical disk drive: Disclosed herein is a misjudgment correction circuit, including, an edge detection section configured to detect, in a binarized full addition signal obtained by adding first and second signals of the same or opposite polarity, edges at which the logic value of the binarized signal changes, a push-pull signal acquisition section... Agent: Rader Fishman & Grauer PLLC

20090279397 - Center error mechanical center adjustment: An apparatus comprising a center error creation circuit and a center error offset injection circuit. The center error creation circuit may be configured to generate a center error signal in response to light from a main laser reflected from a surface of an optical disc. The center error offset injection... Agent: Christopher P Maiorana, PC Lsi Corporation

20090279400 - Information reproducing device and method, and computer program: An information reproducing apparatus (200) is provided with: a reproducing device (202, 205, 206) for reproducing record information recorded on an information recording medium (100) which is provided with a first recording layer (L0) to which first medium region information (110) is assigned and a second recording layer (L1) to... Agent: Young & Thompson

20090279399 - Optical head and optical disc device: A tilt can be detected highly accurately by minimizing the tilt detection error. An optical head includes: an objective lens for converging a light beam from a light source onto an optical disc; a photodetector section receiving the beam, reflected from the disc, at divided areas on its photodetection plane... Agent: Mark D. Saralino (pan) Renner, Otto, Boisselle & Sklar, LLP

20090279401 - Recording medium, apparatus and method for recording/reproducing data on/from recording medium: A recording medium and an apparatus for recording/reproducing data on the recording medium, which are capable of controlling access to the recording medium by recording control information for controlling access for reading the data, are disclosed. When a function included in the recording medium cannot be performed, Unknown Rules are... Agent: Harness, Dickey & Pierce, P.L.C

20090279402 - Information recording medium, information recording apparatus and method, and computer program: An information recording apparatus is for recording user data and recording management data onto an information recording medium being provided with: a first recording layer; and a second recording layer, each of the first recording layer and the second recording layer having a user data area to record therein at... Agent: Young & Thompson

20090279398 - Portable recorder/players with power-saving buffers: In electronic devices such as combination CD-ROM and MP3 recorder/players power is conserved by buffering audio or visual data in a solid state memory, preferably of the FLASH or DRAM type, before writing the data to a rotating hard disk. Alternatively, audio and/or visual data, including musical works and still... Agent: William C. Fuess

20090279403 - Optical disc device: Light emitted from a radiation light source 1 passes through a diffraction grating 3a and is separated into transmitted light a, +1st order diffracted light b, and −1st order diffracted light c. The transmitted light a, +1st order diffracted light b, and −1st order diffracted light c are collected through... Agent: Hamre, Schumann, Mueller & Larson P.C.

20090279404 - Apparatus and method for writing optical information: An optical disk writing apparatus enhances writing accuracy by writing first data (e.g., test data) that encodes a first writing strategy within first patterns on an optical disk, in response to a first writing signal. A reproducing signal is generated in response to reading the first data from the optical... Agent: Myers Bigel Sibley & Sajovec

20090279405 - Optical disc drive, optical storage medium, optical storage medium inspection apparatus, and optical storage medium inspection method: An optical disc drive having an optical pickup head emitting a light beam to an optical storage medium, detecting the light beam reflected from the optical storage medium, and outputting a signal based on the received reflected light, having a jitter measuring unit measuring jitter in signals output from the... Agent: Wenderoth, Lind & Ponack L.L.P.

20090279406 - Hologram recording and reproducing system: A hologram recording and reproducing system for recording or reproducing information to or from a hologram record carrier that stores an optical interference pattern of a reference beam and a signal beam therein as a diffraction grating, includes: light producing means that generates a reference beam and a signal beam... Agent: Sughrue Mion, PLLC

20090279407 - Setup for storing data in a holographic storage medium: The present invention relates to a setup for storing data in a holographic storage medium, comprising a spatial light modulator medium (18), a detector (20), a holographic storage medium (10), a first lens (22) between the spatial light modulator medium and the holographic storage medium, and a second lens (24)... Agent: Philips Intellectual Property & Standards

20090279408 - Optical data recording/reproducing system picking up multiple tracks between guard bands: The present invention relates to an optical system for performing radial tracking on an optical record carrier (100). The optical system contains light dividing means, e.g. a grating, for separating a light beam into a main beam (52) for reading and/or recording information as readable effects on the carrier, and... Agent: Philips Intellectual Property & Standards

20090279410 - Method and apparatus for controlling spherical aberration correction for an optical disk drive: The invention provides a method for controlling spherical aberration correction for an optical disk drive. First, a collimator lens is moved to a first target position for spherical aberration correction. A driving time of motion of the collimator lens is then calculated. A prohibiting time is then determined according to... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20090279409 - Optimal detection of twodos signals: A method and a device for simultaneously reading information from a plurality of data tracks (14) of an optical disc (22) by means of a detector illuminating said plurality of data tracks with laser spots (25), wherein light reflected from the laser spots is collected by means of a servo... Agent: Philips Intellectual Property & Standards

20090279411 - Information recording medium: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of... Agent: Connolly Bove Lodge & Hutz LLP

20090279412 - Information recording media, a method for recording/reproducing information, an apparatus for recording/reproducing information: An information recording medium includes a plurality of layers for recording or reproduction of information by irradiation, wherein each of the layers includes an emboss portion and wobble portion including wobbles of a first frequency and a second frequency that is different from the first frequency. The first frequency is... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090279413 - Information recording medium: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of... Agent: Connolly Bove Lodge & Hutz LLP

20090279414 - Information recording medium having substrate with microscopic pattern and reproducing apparatus therefor: A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a... Agent: Connolly Bove Lodge & Hutz LLP

20090279415 - Information recording medium: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of... Agent: Connolly Bove Lodge & Hutz LLP

20090279417 - Information recording apparatus: An information recording apparatus is disclosed that includes a control unit that controls operations of recording user data on an information recording medium having plural recording layers. When a second layer following a first layer of the recording layers remains unrecorded at the time user data recording performed in response... Agent: Dickstein Shapiro LLP

20090279416 - Optical disc and optical recording method: The invention provides an optical disc (100) including a first substrate (10), an image-recording layer (20), a second substrate (50), an information-recording layer (60), and a cover layer (70) disposed in this order, wherein the thickness of the first substrate (10) is 0.5 to 0.7 mm, the thickness of the... Agent: Taiyo Corporation

20090274016 - Magneto-optical device: A magneto-optical device is disclosed that includes a non-magnetic support body and a fine particle arrangement layer on the non-magnetic support body. The fine particle arrangement layer includes multiple regularly arranged fine metal magnetic particles. In the magneto-optical device, magnetization is generated by applying an external magnetic field to the... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090274017 - Mixed-signal single-chip integrated system electronics for data storage devices: An integrated data storage control system provides, in a single integrated circuit, RDC, servo logic, ATA interface, microprocessor, and other formerly discrete components in one highly integrated system design. The integrated circuit is rendered using a single integrated circuit technology type (e.g., digital CMOS) for all components. Analog and digital... Agent: Mcandrews Held & Malloy, Ltd

20090274018 - Recording device and radial offset calibration method: The present invention relates to a method of calibrating a radial offset of an optical recorder after a recordable record carrier is inserted (1000), the method comprising the steps of: determining wobble signal amplitudes at different radial offset values of a radial control loop (102), finding an optimal radial offset... Agent: Philips Intellectual Property & Standards

20090274019 - Optical scanning apparatus for appliances for recording or reproducing information using an optical recording medium: The invention provides an optical scanning apparatus for appliances for recording or reproducing information using an optical recording medium, said scanning apparatus automatically matching itself to the curvature of a curved recording medium or of a recording medium with axial runout without there being different wire diameters for the resilient... Agent: Thomson Licensing LLC

20090274020 - Optical head unit and optical information recording/reproducing apparatus: An optical head unit is configured as an optical head unit corresponding to an optical recording medium of BD standard, and an optical recording medium of HD DVD standard. A magnification-variable lens includes convex lens, concave lens, and convex lens. The magnification-variable lens allows each lens to be movable along... Agent: Foley And Lardner LLP Suite 500

20090274021 - Optical information recording/reproducing method and optical information recording/reproducing device: An acceleration pulse waveform adjusting circuit (10) and a deceleration pulse waveform adjusting circuit (11) change the amplitude of a track jump pulse in accordance to linear velocity, so as to stably carry out track jump over a wide range of linear velocities. In case tracking gain is to be... Agent: Wenderoth, Lind & Ponack L.L.P.

20090274022 - Optical disc device: A focus error signal is generated by a first-order diffracted light diffracted by regions 23b, 24b on a hologram plane 2a, and an offset of a tracking error signal is canceled by first-order diffracted light diffracted by regions 21a, 22a, 23a, 24a on the hologram plane 2a. Consequently, even when... Agent: Hamre, Schumann, Mueller & Larson P.C.

20090274025 - Methods and devices for controlling access to an optical disc: A device for controlling access to an optical disc includes a control word calculator and a numerically controlled oscillator (NCO). The control word calculator is arranged to calculate a control word corresponding to a radius where the optical disc is accessed. In addition, the NCO is arranged to generate an... Agent: North America Intellectual Property Corporation

20090274026 - Optical storage medium, information recording apparatus, and information reproducing apparatus: An optical storage medium can be provided by which illegal usage of the optical storage medium involving an infringement on the copyright can be prevented effectively without impairment of the functions for reproducing physical format information and optical storage medium manufacturing information. The optical storage medium includes a main information... Agent: Hamre, Schumann, Mueller & Larson P.C.

20090274023 - Disc drive and photo-detector circuits: A method of reducing power dissipation in a variable-gain photo-detector circuit is described. The variable-gain photo-detector circuit has an output to output a main spot signal and at least one side spot signal. The main spot (M) and the side spot (Si or S2) are formed by separating a light... Agent: Philips Intellectual Property & Standards

20090274024 - Optical-irradiation-power calibration method and information recording/reproducing unit: The optical information recording/reproducing unit distinguishes an unrecorded area of a set optical disc (step A100). Thereafter, recording is performed in the unrecorded area under a plurality of recording conditions wherein the recording power is changed with a bias power being constant, to select a recording power providing an optimum... Agent: Nec Corporation Of America

20090274027 - Storage device and its drive startup method: The time required for starting up drives in a storage device mounted with both hard disk drives and solid state drives is shortened. A storage controller of the storage device identifies the type (HDD/SSD) of the mounted drives before starting up the drives. The storage controller thereafter performs staggered spinup... Agent: Mattingly & Malur, P.C.

20090274028 - Multi-bit phase alignment for synchronization mark pattern matching: Embodiments of the present invention relate to the detection of synchronization marks in data storage and retrieval. To detect a synchronization mark, embodiments of the present invention require both pattern matching and proper phase alignment, following a repeating synchronization field. According to one particular embodiment, proper phase alignment following a... Agent: Townsend And Townsend And Crew LLP

20090274029 - Optical pickup and information device: An optical pickup (100) includes: (i) a light source (101) for emitting a laser beam; (ii) an optical system (105, etc.) for introducing the laser beam into one of recording layers; (iii) an optical function element (104) for changing a predetermined polarized state in the laser beam in the unit... Agent: Nixon & Vanderhye, PC

20090274030 - Optical pickup and optical disc apparatus: A base of an optical pickup includes a first bearing portion through which one of two guide shafts disposed in parallel to each other is inserted and a second bearing portion through which the other guide shaft is inserted, and is slidable along the two guide shafts. Under the first... Agent: Morgan Lewis & Bockius LLP

20090274031 - Optical pickup and information device: An optical pickup for irradiating an information recording medium, such as a DVD, with a laser beam when an information signal is recorded or reproduced, and information equipment provided with the optical pickup.... Agent: Nixon & Vanderhye, PC

20090274032 - Optical disc device: This optical disc drive can read and/or write data from/on an optical disc 20 with multiple information layers including first and second information layers. The drive includes: a light source 3, 4 that emits the light beam; an objective lens 1; an actuator 2 for moving the objective lens perpendicularly... Agent: Mark D. Saralino (pan) Renner, Otto, Boisselle & Sklar, LLP

20090274033 - Optical recording medium and production method therefor, and sputtering target and production method therefor: An optical recording medium includes a substrate having features that define track regions, an optical recording layer disposed on the substrate, and a light-transmitting layer disposed on the optical recording layer. The optical recording layer has a composition of (Sb2Se3)wTexOyPdz, where w, x, y, and z each represent a molar... Agent: K&l Gates LLP

20090274034 - Optical recording medium, visible information recording method and method for using dye compound: In Formula (1), Ra1, Ra2, Ra3, Rb1, Rb2 and Rb3 each independently represent a hydrogen atom, or a monovalent substituent (Ra2 and Ra3 may bonded to each other to form a 5-membered to 7-membered heterocyclic ring), A represents a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aryl group,... Agent: Sughrue Mion, PLLC

20090262608 - Head slider and disk drive: Embodiments of the present invention provide a technique for projecting both a write element portion in writing and a read element portion in reading, and controlling a projecting distance of each write element and read element. According to one embodiment, a light absorbing member and a thermally expanding member are... Agent: Townsend And Townsend And Crew LLP

20090262609 - Disc transportation mechanism and disk processing device: A disc transportation mechanism for a disc processing device holds and transports discs by gripping the center hole of the disc. The disc transportation mechanism has a hole position detector and a position adjustment mechanism. The hole position detector detects the position of the center hole in a disc discharged... Agent: Townsend And Townsend And Crew, LLP

20090262610 - Apparatus having switchable servo gains and offsets for optical disk drive and method thereof: An apparatus having switchable servo gains and offsets for an optical disk drive adjusts its gains and offsets through the coupling of a servo signal and a switch with several changeable paths. The servo signals are either designated to undergo signal reduction with respect to a first offset, through the... Agent: Connolly Bove Lodge & Hutz LLP

20090262612 - Information processing apparatus, information processing method, and computer program: An apparatus and a method for quickly starting recording seamless-playable data are provided. At the end of recording a preceding record content, identification information of a clip information file for a subsequent record content to be recorded next is recorded in an attribute information storage file set for the preceding... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20090262613 - Optical disk apparatus and disk identification method: A highly reliable optical disk apparatus adapted to record and reproduce the information in and from plural types of optical disks is disclosed. An acquisition unit acquires a predetermined signal from the reflected light obtained by radiating a predetermined laser on each of the optical disks. A comparator compares the... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090262614 - Demodulation of a sampling signal from a storage medium: h

20090262611 - Optical drive with improved laser power control (lpc): The invention relates to an optical drive for recording information on an optical carrier or disk (1). The optical drive has a radiation source (4) controllable by control means (50, 22) having calibrated values for a threshold current (I_THR_O) and a change current (I_delta_O). The control means (50, 22) is... Agent: Philips Intellectual Property & Standards

20090262615 - Optical disc drive and method of controlling the same: An optical disc drive, which is capable of stably controlling a laser diode without having an influence on other data by recording a test pattern in at least one of a run-in area and a run-out area of a recording unit block and detecting the characteristics of the laser diode,... Agent: Stanzione & Kim, LLP

20090262616 - Method and apparatus for determining optical disc recording parameters: A method and apparatus for determining the parameters for disc recording is provided. For those discs that haven't pre-stored recording information or have pre-stored recording information not meeting the quality requirement, according to the method of the present invention, set the initial values of record strategy parameters firstly, then perform... Agent: Philips Intellectual Property & Standards

20090262617 - Information recording device: An information recording device is provided, which is capable of performing physical reformatting at a high speed while avoiding unnecessary substitution processing after the physical reformatting. A disc recording and reproduction drive 1020 records information on an information recording medium including a volume space for recording user data, a spare... Agent: Hamre, Schumann, Mueller & Larson P.C.

20090262618 - Tilt adjusting method and information recording/reproducing apparatus using the same: [Problems] To effectively perform optimal tilt adjustment. [Means for Solving the Problems] A tilt adjusting method adjusts a tilt angle of an actual incident light and reflected light with respect to an incident light and a reflected light under optimal tilt when recording and reproducing data onto/from an information recording... Agent: Sughrue Mion, PLLC

20090262619 - Optical storage media with embedded security device: An optical disk with an embedded security device, or wafer, is presented. The security device includes security features that enable the identification of genuine optical disks versus counterfeit optical disks. Methods for creating optical disks embedded with security devices are also presented. A security device is placed on the center... Agent: Vierra Magen/microsoft Corporation

20090262620 - Methods and devices for detecting wobbles on an optical disc: A device for detecting wobbles on an optical disc is provided, where the device is utilized for generating a wobble signal according to a plurality of detection signals. The device includes an analog signal processing circuit, a pair of analog-to-digital converters (ADCs), and a digital signal processing circuit. The analog... Agent: North America Intellectual Property Corporation

20090262621 - Method and apparatus for inspecting a pattern shape: An apparatus for inspecting a pattern shape of a magnetic record medium or its stamper includes: a moving mechanism, on which an object to be inspected where a pattern is formed is placed and which moves the object to be inspected in a radial direction while rotating the object; an... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090262622 - Integrated standalone optical disc duplication and labeling system capable of recording information on the data side and printing images by direct laser labeling on the opposite side optical disc: Present invention provides a one-stop simplified mechanism of optical disc duplication and labeling, all done within the same integrated standalone system, saving the trouble of multi-step disc handling and the saving the cost of additional expenses related to the use of traditional labeling method such as ink, ribbons and other... Agent: Law Offices Of J.f. Lee

20090262624 - Optical disk apparatus: Provided is an optical disk apparatus which optimizes a frequency of a high frequency superimposing operation upon reproduction so that good reproduction performance is realized in a wide irradiation power range of a laser power. The optical disk apparatus includes: a semiconductor laser device; an optical disk discrimination circuit for... Agent: Fitzpatrick Cella Harper & Scinto

20090262623 - Optical media format: Apparatuses, products, devices and methods, of manufacture consistent with the invention include optically readable media with at least one mechanism, chemical, agent, and/or process for limiting the time period that at least a portion of encoded information can be read and/or accessed by an optical beam and/or reader capable of... Agent: Morris Manning Martin LLP

20090262626 - Information recording medium, and apparatuses for reproducing, recording, and recording and reproducing thereof, and methods for reproducing, recording, and recording and reproducing thereof: An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a continuous second... Agent: Connolly Bove Lodge & Hutz LLP

20090262627 - Information recording medium, and apparatuses for reproducing, recording, and recording and reproducing thereof, and methods for reproducing, recording, and recording and reproducing thereof: An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a continuous second... Agent: Connolly Bove Lodge & Hutz LLP

20090262625 - Optical disk device: An optical disk device is provided to carry out a stable operation of a reflection-type photo sensor which detects a position of an optical pickup unit and to simplify an assembly process. The optical disk device includes: a chassis; an optical pickup unit which is disposed in the chassis and... Agent: Mcdermott Will & Emery LLP

20090262628 - Hologram recording apparatus and method, computer program, and hologram recording medium: A hologram recording apparatus (300) records record information into a hologram recording medium (100) on which a hologram recording layer (11) and a position information recording layer (13). The hologram recording apparatus is provided with: a first recording device (101) for recording the record information into the hologram recording layer;... Agent: Nixon & Vanderhye, PC

20090262629 - Optical head, optical disc device and information recording and/or reproducing device: An optical head is provided with a light source for emitting a first laser beam having a first wavelength shorter than 430 nm, a two-wavelength light source for emitting a second laser beam having a second wavelength equal to or longer than 430 nm, a flat beam splitter in the... Agent: Wenderoth, Lind & Ponack L.L.P.

20090262632 - Apparatus and method for assembling lens module: An apparatus for assembling a lens module, is provided. The lens module includes a lens and a lens holder for receiving the lens. The lens holder has a through hole and a retainer formed in the through hole. The apparatus includes a base for supporting the lens holder, and a... Agent: PCe Industry, Inc. Att. Steven Reiss

20090262631 - Objective lens driving apparatus, optical pickup, and information recording / reproducing apparatus: An objective lens driving device is provided with an objective lens; a lens holder for holding the objective lens; a pair of linear suspension springs for supporting the lens holder at each one end; a spring holder whereupon the other ends the springs are fixed; and a driving means for... Agent: Nixon & Vanderhye, PC

20090262630 - Optical control device, optical information recording/reproducing device, optical information recording medium and optical head control method: An optical controller includes a light source for emitting light, an object lens for condensing light emitted from the light source, a light detection unit for receiving light reflected on an optical information recording medium and outputting a signal corresponding to the amount of the light, and a laser control... Agent: Ratnerprestia

20090262633 - Optical disc apparatus and optical disc replay method: When an optical disc apparatus reproduces information from an optical disc, it converges a reading light beam emitted from an LED to substantially collimated light and projects it to the optical disc to cause it to be reflected by reflection surface thereof so as to make it become a reading... Agent: Wolf Greenfield & Sacks, P.C.

20090262634 - Focus optical system and optical disc master exposure apparatus: In a focus optical system for optical discs or optical disc master exposure apparatuses, a relative positional relation between a cylindrical lens and a 4-division detector in an astigmatic optical system is adjust so that an interference fringe appearing in reflected light derived from an optical disc master is made... Agent: Wenderoth, Lind & Ponack L.L.P.

20090262635 - Objective optical system for optical pickup apparatus, optical pickup apparatus, driving apparatus for optical information recording medium, condenser lens and optical path compounding element: An objective lens system for an optical pickup apparatus, includes in order from an object side: a first lens group having negative paraxial power P1 (mm−1); and a second lens group having positive paraxial power P2 (mm−1) for converging a light flux emitted from the first lens group on an... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090262637 - Passive stylus for capacitive sensors: A passive stylus for capacitive sensors comprises a tip and a shaft. The tip is configured to couple electrically with a capacitive sensing device and to couple physically and electrically with the stylus shaft. The tip comprises a contact surface, a support region, and a flexible region. The contact surface... Agent: Synaptics C/o Wagner Blecher LLP

20090262638 - Spin-torque memory with unidirectional write scheme: Spin torque magnetic memory elements that have a pinned layer, two free layers, and a current-blocking insulating layer proximate to at least one of the free layers. The resistive state (e.g., low resistance or high resistance) of the memory elements is altered by passing electric current through the element in... Agent: Campbell Nelson Whipps, LLC

20090262636 - Wire-assisted magnetic write device including multiple wire assist conductors: A magnetic device includes a write element including a write element tip, and a conductive coil for carrying a write current to induce a first field in the write element. A first conductor proximate a trailing edge of the write pole tip is operable to carry a first assist current... Agent: Kinney & Lange, P.A.

20090262639 - Land prepit signal detecting circuit: A threshold voltage generating circuit detects the amplitude ΔV of the wobble signal included in the push-pull signal, and generates a threshold voltage Vth based upon the amplitude ΔV of the wobble signal thus detected. A first filter removes the high-frequency components from the push-pull signal, thereby extracting the wobble... Agent: Cantor Colburn, LLP

20090262640 - Optical disc manufacturing method, disc master manufacturing method, and optical disc: An optical-disc manufacturing method including the steps of: fabricating a pre-exposure disc master by forming, on a substrate, a heat accumulation layer having a thickness of 17% or less of a recording-laser wavelength and forming an inorganic resist layer; performing exposure of a recording-signal pattern having pits and spaces with... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.