US PATENT SUBCLASS 33 / 445
.~.~.~ By rack and pinion

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

403  DF  STRAIGHTEDGE TYPE {16}
430  DF  .~ Base attached {8}
443  DF  .~.~ Both ends connected {3}
445.~.~.~ By rack and pinion

DEFINITION

Classification: 33/445

By rack and pinion:

(under subclass 443) 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.

SEE OR SEARCH THIS CLASS, SUBCLASS:

447, and 450, for other straightedge devices which have means for positive movement.