Tools and hardware – Other tools and implements – Screwdriver type
Patent
1997-03-21
1999-02-16
Hyder, Philip S.
Tools and hardware
Other tools and implements
Screwdriver type
0804
Patent
active
D04056728
REFERENCES:
patent: D297909 (1988-10-01), Wilbanks
patent: D311483 (1990-10-01), Espin
patent: D312034 (1990-11-01), Espin
patent: D312954 (1990-12-01), Wilbanks
patent: 3175593 (1965-03-01), Launay
patent: 4434687 (1984-03-01), Vickio
patent: 4590825 (1986-05-01), Vaughn
J.C. Whitney Catalog, p. 147, Hex shank screwdriver bit, located at bottom of page, 1993.
Snap On Tools Catalog, p. 180, Screwdriver Hex Shank Bits, 1990.
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