Screwdriver

Details Screwdriver Screwdriver

1995-07-17

1996-12-10

Hyder, Philip S.

Tools and hardware

Other tools and implements

Screwdriver type

D8 87

Patent

active

D03763056

REFERENCES:
patent: D156536 (1949-12-01), Keidan
patent: D160706 (1950-10-01), Hettrick
patent: D197757 (1964-03-01), Nagamori
patent: D328699 (1992-08-01), Shaanan et al.
patent: 1144210 (1915-06-01), Kincaid
patent: 1442181 (1923-01-01), Simon
patent: 2673284 (1954-03-01), Henderson
patent: 2736792 (1956-02-01), Freeland
patent: 3292678 (1966-12-01), Noga
patent: 3603782 (1971-09-01), Wortmann
patent: 3730238 (1973-05-01), Butler
patent: 3753455 (1973-08-01), Butler

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