Screw driver

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2000-02-07

2001-01-02

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

D0435774

CLAIM:
The ornamental design for a screw driver, as shown and described.

REFERENCES:
patent: D. 273268 (1984-04-01), Smith
patent: D. 310472 (1990-09-01), Mader
patent: D. 329367 (1992-09-01), Landy
patent: D. 388681 (1998-01-01), Schaffer et al.
patent: D. 405335 (1999-02-01), Lin
patent: D. 418731 (2000-01-01), Rowlay et al.
patent: D. 421886 (2000-03-01), Jau
patent: D. 425388 (2000-05-01), Lin

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