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  Wall hole patching deviceUSPTO Application #: 20080083185Title: Wall hole patching device Abstract: A device for patching and repairing a hole on a double-walled partition wall includes an umbrella-like element and a support frame. The umbrella-like element includes a stem provided at a rear end with external screw threads for a nut to screw thereto, and an umbrella-like front head fixed to a front end of the stem. The support frame includes two legs and a transverse bar extended between and held by the legs to a fixed distance from a wall surface having a wall hole to be patched. The transverse bar is provided with a long through hole, via which a rear end of the stem of the umbrella-like element is rearward extended. The umbrella-like front head may be forward extended beyond the wall hole to seal an inner end of the wall hole and thereby prevents patching material filled in the wall hole from rearward falling off the hole. (end of abstract) Agent: Bruce H. Troxell - Falls Church, VA, US Inventor: Hon-Chang Lin USPTO Applicaton #: 20080083185 - Class: 52514 (USPTO)
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