US PATENT SUBCLASS 33 / 493
.~.~ Particular material

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

403  DF  STRAIGHTEDGE TYPE {16}
483  DF  .~ Rules {4}
493.~.~ Particular material

DEFINITION

Classification: 33/493

Particular material:

(under subclass 483) Subject matter wherein the straightedge is constructed of some specified type of material.

(1) Note. Included in these minerals are plastics, wood, and metals.