US PATENT SUBCLASS 33 / 25.1
.~.~ Parallelogram type

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

18.1  DF  SCRIBER {10}
23.01  DF  .~ Pantographic {12}
25.1.~.~ Parallelogram type {4}
25.2  DF  .~.~.~> Simple parallelogram
25.3  DF  .~.~.~> Universally parallel bar
25.4  DF  .~.~.~> Progressive lettering
25.5  DF  .~.~.~> Tandem pantographs

DEFINITION

Classification: 33/25.1

Parallelogram type:

(under subclass 23.01) Subject matter in which the connection between the tracing and the scribing members comprises four bars pivoted together in substantially the form of a parallelogram.