US PATENT SUBCLASS 33 / 432
.~.~ Perspective drawing

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

403  DF  STRAIGHTEDGE TYPE {16}
430  DF  .~ Base attached {8}
432.~.~ Perspective drawing {2}
433  DF  .~.~.~> With T-square straightedge
434  DF  .~.~.~> With parallel straightedge arrangement (i.e., drafting machine)

DEFINITION

Classification: 33/432

Perspective drawing:

(under subclass 430) Subject matter comprising a device specially designed to help depict from a plan or elevation a view as it would appear to the eye.