Screwdriver

Details Screwdriver Screwdriver

1999-06-18

2000-05-02

Holtje, Martie K.

Tools and hardware

Other tools and implements

With relative movement of parts while performing function

D8 82, 0805

Patent

active

D04238974

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patent: 3935909 (1976-02-01), Mabuchi et al.
patent: 4631992 (1986-12-01), Eckman
patent: 4721169 (1988-01-01), Nagasawa et al.
patent: 4772765 (1988-09-01), Markle et al.
patent: 5525889 (1996-06-01), Chan et al.

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