US PATENT SUBCLASS 33 / 491
.~.~.~ Selectable

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

403  DF  STRAIGHTEDGE TYPE {16}
483  DF  .~ Rules {4}
484  DF  .~.~ With attachment {5}
491.~.~.~ Selectable

DEFINITION

Classification: 33/491

Selectable:

(under subclass 484) Subject matter wherein the straightedge is constructed to provide a choice of ruling edges.