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Dynamic magnetic information storage or retrieval November recently filed with US Patent Office 11/09

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
  
11/26/2009 > 24 patent applications in 17 patent subcategories. recently filed with US Patent Office

20090290245 - Data storage device: A data storage device includes: a recording medium that has two or more system data recording areas where system data are recorded on a multiple basis, and a user data recording area where user data is recorded; a head that writes and reads data into and from the recording medium;... Agent: Greer, Burns & Crain

20090290247 - Abnormality determining apparatus: In a RAID apparatus, an error determining processing unit determines whether an HDD is normal based on an error determining condition obtained from an amount of increase of NON MEDIUM ERROR COUNT and the number of accesses memorized on a control table, and detects the HDD with abnormal performance.... Agent: Staas & Halsey LLP

20090290249 - Management apparatus, storage system, and storage apparatus management method: There is provided a management apparatus of a storage apparatus. The management apparatus includes an acquisition determination section that determines whether predetermined identification information can be acquired or not from a mounting apparatus that mounts at least one storage apparatus and has at least one predetermined identification information assigned thereto,... Agent: Staas & Halsey LLP

20090290246 - Method for testing performance of a magnetic head slider: A method for testing performance of a magnetic head slider includes the steps of: (1) rotating the disk and positioning the slider over the rotating disk at an initial fly-height; (2) exciting the fly-height actuator to make the slider touch the disk and recording a touch down spacing of the... Agent: Nixon & Vanderhye, PC

20090290248 - Pressing head structure for testing key durability: A pressing head structure (100) for testing key durability includes a pressing mechanism (10), a rubber head (40), a connecting mechanism (20) and a balance mechanism (30). The pressing mechanism includes a sliding rod (12) and a first spring (16). The first spring is placed over the sliding rod. The... Agent: PCe Industry, Inc. Att. Steven Reiss

20090290251 - Hard-disk drive, method of controlling the hard-disk drive, and method of manufacturing the hard-disk drive: A hard-disk drive. The hard-disk drive includes a magnetic-recording disk having a plurality of tracks formed thereon. The hard-disk drive also includes a magnetic-recording head configured to be positioned over a target track selected from the plurality of tracks and configured to write data to and to read data from... Agent: Hitachi C/o Wagner Blecher LLP

20090290250 - Magnetic recording medium, method for production thereof and magnetic recording and reproducing device: A discrete track-type magnetic recording medium (30) includes a nonmagnetic substrate (1), a magnetic recording track and a servo signal pattern which are provided on at least one side of the nonmagnetic substrate, and a nonmagnetic part (4) consisting of a nonmagnetic alloy containing Si for physically separating the magnetic... Agent: Sughrue Mion, PLLC

20090290252 - Information memory device: A control circuit which controls recording of data in a disk recording medium in an information memory device provided with the disk recording medium that rotates and has tracks of plural data sectors; a head that relatively moves along the tracks; and a recording section that records data in plural... Agent: Greer, Burns & Crain

20090290253 - Servo information correcting method: A operation of storing a post code, which is read from each servo frame on a target track of a disk recording medium, in a memory if an on-track condition for determining that a head is controlled to be positioned on the target track is satisfied is executed. Next, a... Agent: Greer, Burns & Crain

20090290254 - Controlling device, magnetic storage medium, storage device, and method for determining offset amount: A magnetic storage medium has tracks and guard bands magnetically separating adjacent tracks. The tracks and the guard bands are alternately and concentrically disposed. The tracks includes a plurality of data tracks in which data can be written and from which data can be reproduced and servo patterns disposed between... Agent: Greer, Burns & Crain

20090290255 - Method of manufacturing magnetic recording media, magnetic recording media and magnetic read/write device: A method of manufacturing magnetic recording media having a main surface on which magnetic tracks 4 are disposed in a substantially concentric arrangement and on which grooves 5 for magnetically separating radially adjoining magnetic tracks 4 from one another are formed is characterized by forming on a flat substrate 1... Agent: Sughrue Mion, PLLC

20090290256 - Perpendicular magnetic recording exchange-spring type medium with a lateral coupling layer for increasing intergranular exchange coupling in the lower magnetic layer: A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG1 and MAG2), each with perpendicular magnetic anisotropy. MAG1 and MAG2 may have a... Agent: Thomas R. Berthold

20090290257 - Magnetic head for perpendicular recording and magnetic recording apparatus: To enable high density recording, improvements to the distribution of the magnetic field originating from a perpendicular recording magnetic head with a narrow track width, high resolution, and narrow erase width were made. According to one embodiment, a perpendicular recording magnetic head is provided with a write head which comprises... Agent: Zilka-kotab, PC- Hit

20090290258 - Storage device equipped with ramp mechanism: In a load/unload type disk drive, when a head for reading/writing information on a disk is retracted outside the disk by a swing arm at the time of stopping the operation of the disk drive, a ramp mechanism holds a lift tab provided at the tip of the swing arm,... Agent: Greer, Burns & Crain

20090290259 - Magnetic head with delayed connection heater shunting: A slider structure that allows a grounded heater element to be employed, while also allowing a decision of whether the slider is to be an “up” slider or a “down” slider to be made in a late stage in the formation of the slider. The slider includes electrical contact pads... Agent: Zilka-kotab, PC- Hit

20090290260 - Systems having components coupled with electrostatic dissipative adhesive: A system in one embodiment includes a substrate; a thin film structure coupled to the substrate, the thin film structure comprising at least one of read transducers and write transducers; a closure; and an electrostatically dissipative adhesive coupling the closure to at least one of the thin film structure and... Agent: Zilka-kotab, PC- Ibm

20090290261 - Carriage assembly and disk drive: A carriage block body is coupled to a support shaft for relative rotation. A carriage arm extends from the carriage block body along an imaginary plane perpendicular to the longitudinal axis of the support shaft. A head suspension is attached to the tip end of the carriage arm. A wiring... Agent: Greer, Burns & Crain

20090290262 - Carriage arm assembly, disk drive and presser member: A carriage arm assembly includes: a carriage arm that holds a head slider and a head IC communicating with the head slider and has a first engagement part between the head slider and the head IC; a signal relay member that are provided on the carriage arm and relays signals... Agent: Greer, Burns & Crain

20090290263 - Piezoelectric element and manufacturing method thereof, head gimbal assembly, and disk drive device with the same: A piezoelectric element comprises a first laminated structure body and a second laminated structure body. Side surfaces of the first and the second laminated structure bodies that are parallel to a laminating direction both have at least a portion etched to form a recess so that a step distance is... Agent: Nixon & Vanderhye, PC

20090290265 - Magnetic head and magnetic disk unit: The magnetic head having shielding layers is capable of preventing fluctuation of output caused by magnetic domain structures of the shielding layers, stabilizing the output, restraining variation of products and improving production yield. The magnetic head comprises: shielding layers for magnetically shielding a magnetoresistance effect reproducing element; hard films being... Agent: Greer, Burns & Crain

20090290264 - Magnetoresistive device of the cpp type, and magnetic disk system: The invention provides a magnetoresistive device of the CPP (current perpendicular to plane) structure, comprising a magnetoresistive unit, and a first, substantially soft magnetic shield layer positioned below and a second, substantially soft magnetic shield layer positioned above, which are located and formed such that the magnetoresistive effect is sandwiched... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090290267 - Magnetic recording and reproducing apparatus with thin-film magnetic head having microwave magnetic exciting function: A magnetic recording and reproducing apparatus with a thin-film magnetic head having microwave magnetic exciting function, includes a metal housing, a magnetic recording medium, arranged in the metal housing, having a magnetic recording layer, and a thin-film magnetic head, arranged in the metal housing, having a write magnetic field production... Agent: Frommer Lawrence & Haug

20090290266 - Spin valve magnetoresistive device with conductive-magnetic material bridges in a dielectric or semiconductor layer alternatively of magnetic material: Magnetoresistive device comprising a spin valve formed from a stack of layers including at least two magnetic layers for which a relative orientation of their magnetisation directions are capable varying under influence of a magnetic field; at least one discontinuous dielectric or semiconducting layer with electrically conducting bridges at least... Agent: Nixon Peabody LLP

20090290268 - Nonvolatile programmable logic gates and adders: Spin torque magnetic logic device having at least one input element and an output element. Current is applied through the input element(s), and the resulting resistance or voltage across the output element is measured. The input element(s) include a free layer and the output element includes a free layer that... Agent: Campbell Nelson Whipps, LLC

  
11/19/2009 > 24 patent applications in 17 patent subcategories. recently filed with US Patent Office

20090284858 - Magnetic recording apparatus and clock signal generating method: According to an aspect of the embodiment, in a magnetic recording apparatus having a magnetic recording medium of a patterned media system, a voltage generated between both terminals of a magnetic field generating coil in a case that a DC current is supplied to a recording element of a magnetic... Agent: Greer, Burns & Crain

20090284857 - Method and apparatus for testing characteristics of thin-film magnetic head: The characteristics of thin-film magnetic heads are evaluated by measuring, in a step and repeat method and apparatus, the magnetic field generated by the respective heads in a bar including multiple heads.... Agent: Leydig Voit & Mayer, Ltd

20090284859 - Data storage device having different control information in different areas and method of providing and employing the same: A data storage device, such as a disk drive unit, includes at least one disk for storing data therein. The disk is divided into a plurality of tracks. The disk has at least a first set of tracks that each have stored therein at least one repeatable runout correction code... Agent: Volentine & Whitt PLLC

20090284860 - Degauss control for magnetic disk-drive preamplifier: One embodiment of the invention includes a preamplifier system for a magnetic disk-drive. The system includes a current distributor configured to generate a reference current and to decay the reference current from a first magnitude to a second magnitude during a degauss period to degauss a magnetic disk write head.... Agent: Texas Instruments Incorporated

20090284861 - Dissipation of liquid droplets in a magnetic disk drive: Magnetic disk drives and associated methods are described for an improved process for dissipating liquid droplets that may accumulate on a slider of the magnetic disk drive. For the droplet removal process, the slider having the liquid droplet is unloaded from the magnetic disk. For example, the slider may be... Agent: Duft Bornsen & Fishman, LLP

20090284862 - Head position control method, head position control device, and magnetic recording evaluation apparatus: A magnetic head position control method is provided to control a magnetic head to follow the track on a DTM disk by accurately detecting the eccentricity compensation amount through a simple process. An angle detection unit detects θ1 at which the relative displacement between the magnetic head and the tracks... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090284863 - Magnetic recording circuit, magnetic recording device, and information recording method: A magnetic recording circuit includes a write amplifier that supplies a recording current to a magnetic recording head, and switches a direction of the recording current in accordance with information. The magnetic recording circuit further includes a control circuit that adjusts a rising speed of the recording current.... Agent: Greer, Burns & Crain

20090284864 - Tape cartridge auxiliary memory containing tape drive functional status information: A data storage library is described including a plurality of tape cartridges each possessing an auxiliary radio frequency memory device. The library also includes, at least one tape drive capable of determining at least one functional status when loaded with one of the tape cartridges wherein the at least one... Agent: Hiscock & Barclay, LLP

20090284865 - Hard disk drive: A hard disk drive includes a base, a disk to record and store data, a head stack assembly provided in the base to read out data from the disk which rotates about a pivot shaft, and an air force dispersion unit positioned adjacent to the head stack assembly to disperse... Agent: Stanzione & Kim, LLP

20090284866 - Fluid bearing device, method of manufacturing the same, and disk drive device: Provided is a fluid bearing device with a hub part having high molding precision and dimensional stability and capable of being produced at low cost. An annular gate (14) is formed at a portion of a cavity (15) corresponding to an outer peripheral edge portion of a lower end surface... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20090284867 - Device having sidegap and method for fabricating same: A method in one approach includes forming a first layer of a nonmagnetic material over two sides of a structure, the first layer being substantially absent from above a top of the structure; depositing an overlayer of an etchable, nonmagnetic material over the first layer and the top of the... Agent: Zilka-kotab, PC- Hit

20090284868 - Magnetic recording medium, magnetic storage apparatus and magnetic recording medium manufacturing method: A magnetic recording medium includes a first upper layer, a first lower layer below the first upper layer, an intermediate layer, provided between the first upper layer and the first lower layer, which magnetically couples the first upper layer and the first lower layer. The first lower layer includes a... Agent: Greer, Burns & Crain

20090284869 - Compliant air bearing slider: A compliant, flexible air bearing slider (ABS) reduces the contact forces between the slider and disk, thereby reducing excessive burnishing and wear and increasing the reliability of the slider. According to an embodiment, an ABS has at least one “compliance-enhancing feature” which reduces the bending mode vibration frequency of the... Agent: Hitachi C/o Wagner Blecher LLP

20090284870 - Head suspension assembly and storage medium drive: An arm has one end coupled to a head suspension and the other end defining a domed surface in a head suspension assembly. The domed surface establishes point contact against the side surface of a head slider. The arm is designed to restrain the direction of application of a force... Agent: Greer, Burns & Crain

20090284871 - Head gimbal assembly and manufacturing method thereof, and disk drive device with the same: A HGA includes a suspension, a seed layer formed on a PZT holding region of a flexure of the suspension and a piezoelectric element deposited on the seed layer. The piezoelectric element is electrically connected with the suspension to form a PZT micro-actuator. The present invention simultaneously conducts the manufacture,... Agent: Nixon & Vanderhye, PC

20090284872 - Magnetic head support and magnetic disk device: A magnetic head support includes a slider on which a magnetic head is mounted; a suspension that supports the slider; and a pair of piezoelectric actuators that are arranged on sides of the slider other than a side on which the magnetic head is mounted so as to be opposed... Agent: Kratz, Quintos & Hanson, LLP

20090284873 - Current perpendicular to plane magnetoresistive sensor employing half metal alloys for improved sensor performance: A magnetoresistive sensor having employing a Mn containing Huesler alloy for improved magnetoresistive performance in a structure that minimizes corrosion and Mn migration. The sensor can be constructed with a pinned layer structure that includes a lamination of layers of Co2MnX and CoFe, where X is Al, Ge or Si.... Agent: Zilka-kotab, PC- Hit

20090284874 - Self-aligned perpendicular writer pole and front shield: A write pole structure includes a write pole having a tip region. A shield structure is spaced from the write pole by a gap at the tip region. The shield structure includes a front shield and a spacer layer on the back of the front shield. A yoke is formed... Agent: Kinney & Lange, P.A.

  
11/12/2009 > 24 patent applications in 17 patent subcategories. recently filed with US Patent Office

20090279197 - Servo signal recording apparatus: A servo signal recording apparatus of the present invention is provided with a tape motion measurement unit 5 that measures the lateral motion of a magnetic tape 3, and outputs tape motion information, a signal processing unit 20 that generates a servo signal that includes the tape motion information output... Agent: Birch Stewart Kolasch & Birch

20090279198 - Method and apparatus for adaptive control and/or use of a vibration sensor in a hard disk drive: Apparatus and methods are disclosed for adaptive control and/or use of a vibration sensor in a hard disk drive (HDD). The HDD, an assembled circuit board and a control circuit are disclosed. The control circuit is configured to electrically couple to piezoelectric devices and includes a sensor interface and a... Agent: Gregory Smith & Associates

20090279199 - Method and apparatus for reducing slider contact probability in a load-unload (lul) hard disk drive: A Load-UnLoad hard disk drive (HDD) with a roll static angle between the slider and the rotating disk surface of at most zero degrees is disclosed. Put another way, the slider contact with the disk surface during loading is reduced when the outer edge is not nearer than the inner... Agent: Gregory Smith & Associates

20090279200 - Storage device, control circuit for storage device, and servo-write-mode identifying method: A servo-mark search control unit detects in a magnetic disk a servo mark matching a servo mark selected by a servo-mark candidate selecting unit. In this case, according to an instruction from a servo-mark search control unit, a non-volatile memory managing unit writes servo-write-mode identification information corresponding to the detected... Agent: Greer, Burns & Crain

20090279202 - Head design for writing servo patterns on magnetic tape: A servo write head is provided and is configured to simultaneously write at least two servo patterns in respective servo bands on linear magnetic tape. Centerlines of the servo patterns are substantially uniformly spaced in the lateral direction. In addition, the servo patterns of all adjacent respective servo bands are... Agent: Cantor Colburn LLP-ibm Europe

20090279201 - Joint specification of servo format and servo reader parameters for tape drive systems: A servo pattern, including stripes arranged in servo bursts for use in position error signal (PES) generation, is provided in which a stripe width is narrower than 1.7 μm and in which the stripes are oriented at an azimuth angle which in absolute value is equal to or larger than... Agent: Cantor Colburn LLP-ibm Europe

20090279203 - System, method and apparatus for integrated bypass channel and diverter for hard disk drives: An integrated bypass channel and diverter assembly for hard disk drives having small form factors is disclosed. A bypass channel is formed directly in the base plate to allow a partial bypass to exist with or without a diverter feature. The design addresses the issue of proper disk shrouding at... Agent: Larson Newman Abel & Polansky LLP

20090279204 - Method and apparatus for flyng height on demand heaters in a hard disk drive: A hard disk drive is disclosed with a slider containing a Flying height On Demand (FOD) heater using two heater sheets configured to be driven by electric currents flowing in essentially opposite directions, causing the magnetic field induced by the FOD heater to be much smaller than prior art FOD... Agent: Gregory Smith & Associates

20090279206 - Fabrication of trapezoidal pole for magnetic recording: A method for forming a magnetic write pole with a trapezoidal cross-section is described. The method consists of first forming a magnetic seedlayer on a base followed by depositing a removable material layer on the seedlayer, and then a resist layer on the removable material layer. A trench is then... Agent: Kinney & Lange, P.A.

20090279205 - Magnetic head and tape drive for reading multiple data formats: A magnetic head is provided for reading and writing data on a data storage media. A first writer and a first reader write and read data of a first format. A second reader reads data of a second format having different read channels than the first format. A third reader... Agent: Brooks Kushman P.C. / Sun / Stk

20090279207 - Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive: A thin-film magnetic head is constructed such that a main magnetic pole layer having a magnetic pole end face on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the main magnetic pole layer on the medium-opposing surface side, a gap layer formed between... Agent: Oliff & Berridge, PLC

20090279208 - Slider, integrated slider, and hybrid storage device: An opening (3) is formed on a surface of a metal film (2), a plurality of axes (4, 5, 6, 7) cross each other substantially perpendicularly at the opening (3), a plurality of periodic grooves (8, 9, 10, 11) are provided for respective axes (4, 5, 6, 7), and each... Agent: Birch Stewart Kolasch & Birch

20090279209 - Magnetic head suspension: An elastic plate that is supported at both ends by a pair of supporting pieces of a supporting part functions as the load bending part. A portion of a load beam base plate that is positioned on a distal end side than a load bending center line BL of the... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20090279210 - Ramp arrangement for a disk drive and method: A digital storage apparatus includes a housing defining a housing interior and defining a ramp support surface. A disk is supported for rotation in the housing. A head gimbal assembly is supported for use in pivotally accessing the disk in performing one or more data accesses and for moving to... Agent: Workman Nydegger 1000 Eagle Gate Tower

20090279211 - Bearing apparatus for a hard disk drive: A low cost method of attaching an actuator arm assembly to a single head hard disk drive that has a reduced part count The actuator arm assembly includes a suspension arm stamped from a metal and a pivot bearing cartridge contained by a reduced mass outer sleeve.... Agent: Saile Ackerman LLC

20090279212 - Two-axis magnetic field sensor with multiple pinning directions: A fabrication process and apparatus provide a high-performance magnetic field sensor (200) from two differential sensor configurations (201, 211) which require only two distinct pinning axes (206, 216) which are formed from a single reference layer (60) that is etched into high aspect ratio shapes (62, 63) with their long... Agent: Ingrassia Fisher & Lorenz, P.C.

20090279213 - Stabilized shields for magnetic recording heads: A basic design is disclosed for bottom shield (S1) and top shield (S2) of the reader shields in a magnetic read-write head. The critical part of new design includes an antiferromagnetic film which pins an antiferromagnetically coupled trilayer (AFCT). The simplest embodiment for top shield, for example, would be a... Agent: Saile Ackerman LLC

  
11/05/2009 > 24 patent applications in 17 patent subcategories. recently filed with US Patent Office

20090273855 - Method for measuring pole width of a slider of a disk drive device: A method for measuring pole width of a slider of a disk drive includes steps of: getting an original image of the pole surface; calculating the light intensity distribution profile of the original image and determining maximum and minimum light intensity data points of the profile; setting average of the... Agent: Nixon & Vanderhye, PC

20090273854 - Method for screening magnetic-recording heads: A method for screening a magnetic-recording head utilizing a simulated-cross-track-gain profile of the magnetic-recording head to provide a manufacturing-qualified, magnetic-recording head. The method includes measuring a track profile of the magnetic-recording head, and providing the simulated-cross-track-gain profile of the magnetic-recording head synthesized utilizing the track profile of the magnetic-recording head.... Agent: Hitachi C/o Wagner Blecher LLP

20090273856 - Timing insensitive method and apparatus for spectral analysis in a disk recording system: A hard disk drive that includes a disk that contains at least one signal and a head that is coupled to the disk. The disk drive also contains a circuit that includes a data sampler that-generates a plurality of data samples from the signal, a harmonic sensor coupled to the... Agent: Irell & Manella LLP

20090273857 - Systems and methods for protecting a sensitive device from corrosion: A method for protecting a magnetic head according to one embodiment includes reducing a relative humidity in a vicinity of a magnetic head by passing an elevated bias current through a sensor of the head during at least some time periods when the sensor is not in use for reading... Agent: Zilka-kotab, PC- Ibm

20090273858 - Substrate for magnetic recording medium, magnetic recording medium, and magnetic recording and reproducing apparatus: It is possible to improve the recording and reproducing S/N ratio, the reproduction signal intensity, and the degree of high density recording. There are provided a plurality of recording tracks formed on a substrate, each recording track being formed of a magnetic material, and non-recording sections formed on the substrate,... Agent: Nixon & Vanderhye, PC

20090273860 - Contact head slider and storage apparatus: A contact surface of a contact head slider is received on a film of a lubricant on a storage medium. The rotation of the storage medium allows the contact surface to slide on the surface of the storage medium. The lubricant adheres to the contact surface. The groove is formed... Agent: Greer, Burns & Crain

20090273859 - Forming a pole tip topography: A method of forming a pole tip topography associated with an air bearing surface (ABS) of a hard disk drive slider is disclosed. The method etches an exposed pole tip region of an ABS at a first angle with respect to the ABS to remove an irregularity from the exposed... Agent: Hitachi C/o Wagner Blecher LLP

20090273861 - Manufacturing method of magnetic recording medium, the magnetic recording medium, and magnetic recording and reproducing apparatus: A magnetic recording medium includes a substrate; and a recording film formed on the substrate and including a main magnetic film, the main magnetic film where a recording area and a guard area are formed by local ion doping, the guard area having saturation magnetization smaller than saturation magnetization of... Agent: Greer, Burns & Crain

20090273862 - Flat e-yoke for cusp write head: A magnetic write pole structure that is configured to greatly simplify the manufacture of a perpendicular magnetic write head. The write head has a magnetic yoke that is oriented along a plane that is perpendicular to the direction of the data track. This allows the entire yoke to be formed... Agent: Zilka-kotab, PC- Hit

20090273864 - Magnetoresistive element including two ferromagnetic layers: A magnetoresistive element includes a first and a second shield, and an MR stack disposed between the shields. The MR stack includes a first and a second ferromagnetic layer, and a nonmagnetic spacer layer disposed between the ferromagnetic layers. The first and second ferromagnetic layers have magnetizations that are in... Agent: Oliff & Berridge, PLC

20090273863 - Thin-film magnetic head for perpendicular magnetic recording and method of making the same: A perpendicular recording thin-film magnetic head comprises a main magnetic pole having a tip main magnetic pole part extending in a height direction from a medium-opposing surface and a base main magnetic pole part connected to the tip main magnetic pole part on a side opposite from the medium-opposing surface... Agent: Oliff & Berridge, PLC

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