US PATENT SUBCLASS 33 / 460
.~.~.~.~ At least one pivot is sliding

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}
456  DF  .~.~ Multipivoted straightedges {3}
459  DF  .~.~.~ Two straightedges pivoted at the ends of a central straightedge {3}
460.~.~.~.~ At least one pivot is sliding {1}
461  DF  .~.~.~.~.~> Central straightedge longitudinally adjustable

DEFINITION

Classification: 33/460

At least one pivot is sliding:

(under subclass 459) Subject matter wherein one or both of the outer straightedges can traverse the pivot.