Screwdriver bit

Details Screwdriver bit Screwdriver bit

2000-06-01

2001-03-13

Hyder, Philip S. (Department: 2912)

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

Design Patent

active

D0438774

CLAIM:
The ornamental design for a screwdriver bit, as shown and described.

REFERENCES:
patent: D. 405672 (1999-02-01), Wirths
patent: 2833548 (1958-05-01), Clark
patent: 3753454 (1973-08-01), Totsu
patent: 3985170 (1976-10-01), Iskra
patent: 4026338 (1977-05-01), Goebel
patent: 4314489 (1982-02-01), Arcangeli
patent: 4434687 (1984-03-01), Vickio
patent: 4590825 (1986-05-01), Vaughn

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