US PATENT SUBCLASS 33 / 433
.~.~.~ With T-square straightedge

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

403  DF  STRAIGHTEDGE TYPE {16}
430  DF  .~ Base attached {8}
432  DF  .~.~ Perspective drawing {2}
433.~.~.~ With T-square straightedge

DEFINITION

Classification: 33/433

With T-square straightedge:

(under subclass 432) Subject matter comprising a headpiece or stock having at least one straightedge and another straightedge connected to the headpiece at substantially its median point at a 90 deg. angle and designed to project beyond the head on its straightedge side.

SEE OR SEARCH THIS CLASS, SUBCLASS:

468, and 479, for similar T-square type devices but not base attached.