US PATENT SUBCLASS 33 / 664
.~.~ Parallelogram type


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

501  DF  GAUGE {61}
663  DF  .~ Proportional line segmenter {2}
664.~.~ Parallelogram type


DEFINITION

Classification: 33/664

Parallelogram type:

(under subclass 663) Subject matter wherein the means interconnecting the members consists of a series of crossed bars pivoted at their midpoints and at each of their ends to a succeeding group of crossed bars capable of being folded or extending to form at any particular setting a plurality of equidistant contact points.