US PATENT SUBCLASS 33 / 25.5
.~.~.~ Tandem pantographs

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  DF  .~.~ Parallelogram type {4}
25.5.~.~.~ Tandem pantographs

DEFINITION

Classification: 33/25.5

Tandem pantographs:

(under subclass 25.1) Subject matter wherein there are serial parallelogram linkage forming the connection between the tracing member and the scribing member.