Tools and hardware – Other tools and implements – Screwdriver type
Patent
1981-06-03
1984-04-24
Lucas, Susan J.
Tools and hardware
Other tools and implements
Screwdriver type
Patent
active
D02735563
REFERENCES:
patent: 1366341 (1921-01-01), Anderson
patent: 2323018 (1943-06-01), De Vellier
patent: 2920489 (1960-01-01), Piquet
patent: 2936010 (1960-05-01), Ansingh
Snap-On Tools Catalog, 3-1979, p. 139, screw driver shaft (bottom right photograph, 2nd from left).
Lucas Susan J.
Royer George R.
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