US PATENT SUBCLASS 33 / 496
.~.~ 180 degree limit

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

403  DF  STRAIGHTEDGE TYPE {16}
495  DF  .~ Pivot joints {3}
496.~.~ 180 degree limit {1}
497  DF  .~.~.~> Locking

DEFINITION

Classification: 33/496

180 degree limit:

(under subclass 495) Subject matter wherein the rotary

movement is limited to extend the straightedges into a straight line position (i.e., 180 deg.).