Screwdriver head

Details Screwdriver head Screwdriver head

2001-01-03

2002-04-16

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

D0455627

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

REFERENCES:
patent: 3831648 (1974-08-01), Hill et al.
patent: D312034 (1990-11-01), Espin
patent: 5309798 (1994-05-01), Markwart et al.
patent: 5868047 (1999-02-01), Faust et al.
patent: D410372 (1999-06-01), Strauch
patent: 5953969 (1999-09-01), Rosenhan
patent: D431768 (2000-10-01), Fiek
patent: 6164171 (2000-12-01), Kaneko et al.
patent: 6193242 (2001-02-01), Robison

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