US PATENT SUBCLASS 33 / 814
.~.~.~ Differential screw

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


33 /   HD   GEOMETRICAL INSTRUMENTS

700  DF  DISTANCE MEASURING {13}
783  DF  .~ Opposed contacts {10}
813  DF  .~.~ Micrometer {10}
814.~.~.~ Differential screw

DEFINITION

Classification: 33/814

Differential screw:

(under subclass 813) Subject matter wherein one of the contacts is advanced by the difference between the movement produced by two threaded elements.