US PATENT SUBCLASS 254 / 13
.~ Screw

Current as of: June, 1999
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254 /   HD   IMPLEMENTS OR APPARATUS FOR APPLYING PUSHING OR PULLING FORCE

11  DF  FLOOR JACK TYPE {5}
13.~ Screw

DEFINITION

Classification: 254/13

Screw:

(under subclass 11) Implement of the floor jack type in which the board-forcing member is provided with a screw by means of which it is caused to travel.