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Class Information
Number: 144/28.1
Name: Woodworking > Special-work machine > Pencil sharpening
Description: A machine including (a) a holder or guide for a workpiece, which workpiece consists of or includes a piece of attritable marking material and (b) either a cutting tool, or a cutting tool and means engaging the tool to retain it on the machine, said tool being movable with respect to the work holder or guide, or to the tool-engaging means, for removing a portion of the material from the end of the workpiece to form a point or beveled edge thereon.










Sub-classes under this class:

Class Number Class Name Patents
144/28.11 Hand-manipulable 19
144/28.2 Including elongated work holder or guide for edge-beveling 3
144/28.3 Movable tool 2


Patents under this class:

Patent Number Title Of Patent Date Issued
8505596 Cutter assembly for an electric pencil sharpener Aug. 13, 2013
8459317 Hand-cranked pencil sharpeners Jun. 11, 2013
8353323 Sharpener with autostop feature Jan. 15, 2013
8205648 Electronic pencil sharpener Jun. 26, 2012
6976314 Sharpener for soft-core pencils Dec. 20, 2005
6799374 Belt wearable pencil sharpener Oct. 5, 2004
6457498 Cosmetic eye and lip pencil sharpener Oct. 1, 2002
6334475 Pencil sharpener Jan. 1, 2002
6065514 Compact handheld battery-operated cosmetic pencil sharpener May. 23, 2000
5077903 Carpenter's pencil sharpener Jan. 7, 1992
5002182 Crayon holder and container Mar. 26, 1991
4961451 Sharpener for rectangular pencils Oct. 9, 1990
4918816 Pencil sharpener Apr. 24, 1990
4815507 Socket mounted pencil sharpener for cosmetic facial pencil Mar. 28, 1989
4513798 Sharpener, specifically for cosmetic sticks Apr. 30, 1985
4431038 Actuating holder for combined electric eraser-pencil sharpeners Feb. 14, 1984
4054164 Pencil sharpener Oct. 18, 1977
4050487 Electric sharpener Sep. 27, 1977
3998253 Lead-pencil sharpener Dec. 21, 1976
3991798 Disposable device for sharpening leads or the like Nov. 16, 1976
3952784 Pencil pointer Apr. 27, 1976











 
 
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