US PATENT SUBCLASS 33 / 461
.~.~.~.~.~ Central straightedge longitudinally adjustable


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  DF  .~.~.~.~ At least one pivot is sliding {1}
461.~.~.~.~.~ Central straightedge longitudinally adjustable


DEFINITION

Classification: 33/461

Central straightedge longitudinally adjustable:

(under subclass 460) Subject matter wherein the middle straightedge is constructed in sections that can be varied in length by telescoping one section relative to the other.