US PATENT SUBCLASS 33 / 742
.~.~.~.~ By clutch

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

700  DF  DISTANCE MEASURING {13}
732  DF  .~ Of flexible material {7}
734  DF  .~.~ By rolling contact {11}
740  DF  .~.~.~ With stop means {2}
742.~.~.~.~ By clutch

DEFINITION

Classification: 33/742

By clutch:

(under subclass 740) Subject matter having means for making a temporary connection between the moving parts.