US PATENT SUBCLASS 33 / 484
.~.~ With attachment

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

403  DF  STRAIGHTEDGE TYPE {16}
483  DF  .~ Rules {4}
484.~.~ With attachment {5}
485  DF  .~.~.~> For performing diverse function
486  DF  .~.~.~> Index {2}
489  DF  .~.~.~> For supporting above work surface
490  DF  .~.~.~> Located on end
491  DF  .~.~.~> Selectable

DEFINITION

Classification: 33/484

With attachment:

(under subclass 483) Subject matter comprising some additional device to facilitate the use of the straightedge for drawing straight line.