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Class Information
Number: 144/28.3
Name: Woodworking > Special-work machine > Pencil sharpening > Movable tool
Description: Machine including means to move, or to guide the movement of, the tool relative to the workpiece and to the tool-retaining means, for the material-removing operation.

Sub-classes under this class:

Class Number Class Name Patents
144/28.9 Rotary work holder or guide 5
144/28.6 Rotatable or revolvable 17
144/28.4 Work actuated tool drive 9
144/28.5 Work controlled switch for tool drive 22

Patents under this class:

Patent Number Title Of Patent Date Issued
8205648 Electronic pencil sharpener Jun. 26, 2012
6237656 Pencil sharpener bit May. 29, 2001

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