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Class Information
Number: 144/28.72
Name: Woodworking > Special-work machine > Pencil sharpening > Movable tool > Rotatable or revolvable > Including orbital or electric motor drive
Description: Machine including means for rotating the tool, which means either (a) includes a pair of rotatable elements having peripheral surfaces in continuous engagement with, and movable relative to, one another for transfer of motive force between said elements or (b) is powered by electrical energy.

Patents under this class:

Patent Number Title Of Patent Date Issued
8505596 Cutter assembly for an electric pencil sharpener Aug. 13, 2013
8353323 Sharpener with autostop feature Jan. 15, 2013
8225827 Sharpener with noise reducing features Jul. 24, 2012
8205648 Electronic pencil sharpener Jun. 26, 2012
8205649 Cutter assembly and electric pencil sharpener Jun. 26, 2012
8196624 Pencil sharpener Jun. 12, 2012
7913731 Pencil sharpener Mar. 29, 2011
7726365 Electric pencil sharpener Jun. 1, 2010
7699082 Electric multi-pencil sharpener Apr. 20, 2010
7669619 Electric pencil sharpener Mar. 2, 2010
7581573 Electric pencil sharpener Sep. 1, 2009
7546858 Pencil sharpener Jun. 16, 2009
7472728 Electrically powered rapid sharpening cosmetic pencil sharpener Jan. 6, 2009
7455087 Electric sharpener for writing instruments Nov. 25, 2008
7360566 Structure of automatic pencil sharpener Apr. 22, 2008
7273079 Electric pencil sharpener Sep. 25, 2007
7240703 Automatic pencil sharpener Jul. 10, 2007
7134461 Pencil sharpener Nov. 14, 2006
6886614 Pencil sharpener May. 3, 2005
6845795 Portable handheld sharpener with loop attachment Jan. 25, 2005
6688197 Notch sawing apparatus for dove-tail joints Feb. 10, 2004
6637481 Apparatus for sharpening a writing instrument Oct. 28, 2003
6470929 Pencil sharpener Oct. 29, 2002
6457498 Cosmetic eye and lip pencil sharpener Oct. 1, 2002
5052453 Structure of pencil sharpener Oct. 1, 1991
4966208 Pencil sharpener Oct. 30, 1990
4601316 Electric pencil sharpener Jul. 22, 1986

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