Screwdriver

Details Screwdriver Screwdriver

1988-08-11

1990-11-13

Holtje, Nelson C.

Tools and hardware

Other tools and implements

Screwdriver type

Patent

active

D03120333

REFERENCES:
patent: 539155 (1895-05-01), Tower
patent: 2620001 (1952-12-01), Fratz et al.
patent: 3363500 (1968-01-01), Simko
patent: 3872904 (1975-03-01), Barlow
Hong Kong Enterprise, Nov. 1987, p. 25, Handles of Screwdrivers, circled.

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