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Class Information
Number: 33/445
Name: Geometrical instruments > Straightedge type > Base attached > Both ends connected > By rack and pinion
Description: Subject matter comprising a bar with teeth on one face for gearing with a pinion or worm gear to assist in a positive manner the mechanical movement of the straightedge device.


Patents under this class:

Patent Number Title Of Patent Date Issued
6907671 Equisect span divider Jun. 21, 2005
5956856 Drawing board assembly Sep. 28, 1999
5056229 Sail plotter Oct. 15, 1991
4342155 Sign-making apparatus Aug. 3, 1982
 
 
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