US PATENT SUBCLASS 33 / 497
.~.~.~ Locking

Current as of: June, 1999
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403  DF  STRAIGHTEDGE TYPE {16}
495  DF  .~ Pivot joints {3}
496  DF  .~.~ 180 degree limit {1}
497.~.~.~ Locking

DEFINITION

Classification: 33/497

Locking:

(under subclass 496) Subject matter having means for positively securing the movement or position of the straightedges at one or more definite points.

SEE OR SEARCH THIS CLASS, SUBCLASS:

469, for pivoted straightedge having means for securing the straightedge to a definite position.