US PATENT SUBCLASS 33 / 439
.~.~.~ Wheel and band

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

403  DF  STRAIGHTEDGE TYPE {16}
430  DF  .~ Base attached {8}
438  DF  .~.~ Universal parallelism arrangement {2}
439.~.~.~ Wheel and band {1}
440  DF  .~.~.~.~> With counterbalance

DEFINITION

Classification: 33/439

Wheel and band:

(under subclass 438) Subject matter comprising a rotatable cylindrical guide and a flexible belt or cord traveling over the cylindrical guide and attached to the straightedge to assist in guiding the movement of the straightedge device.