US PATENT SUBCLASS 33 / 18.3
.~ Perspective drawing

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

18.1  DF  SCRIBER {10}
18.3.~ Perspective drawing

DEFINITION

Classification: 33/18.3

Perspective drawing:

(under subclass 18.1) Subject matter wherein the means for describing a line generates an oblique three-dimensional drawing from plan and elevational drafting views.