US PATENT SUBCLASS 33 / 469
.~.~.~.~ Locking

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

403  DF  STRAIGHTEDGE TYPE {16}
452  DF  .~ Plural straightedges, relatively moveable {6}
465  DF  .~.~ Single pivot {6}
468  DF  .~.~.~ T-head with pivoted straightedge {2}
469.~.~.~.~ Locking

DEFINITION

Classification: 33/469

Locking:

(under subclass 468) Subject matter having means for holding the position of the pivoted straightedge with respect to the head or stock at one or more definite points.