Screwdriver

Details Screwdriver Screwdriver

1987-07-07

1990-07-10

Holtje, Nelson C.

Tools and hardware

Other tools and implements

Screwdriver type

D21141

Patent

active

D03090892

REFERENCES:
patent: D211809 (1968-07-01), Genin
patent: D248922 (1978-08-01), Osak, Jr.
patent: D266779 (1982-11-01), Appel et al.
patent: 1547093 (1925-07-01), Burch
patent: 3340751 (1967-09-01), Figgis

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