Hammer drill

Details Hammer drill Hammer drill

2002-04-08

2003-10-21

Coles, Doris V. (Department: 2913)

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

Design Patent

active

D0480937

CLAIM:
The ornamental design for a hammer drill, as shown.

REFERENCES:
patent: 1679185 (1928-07-01), Sweet
patent: 3395765 (1968-08-01), Schnettler
patent: D339510 (1993-09-01), Sakamoto et al.
patent: D408699 (1999-04-01), Zurwelle
patent: D409468 (1999-05-01), Uchida et al.
patent: D428786 (2000-08-01), Hayakawa et al.
patent: D440851 (2001-04-01), Sakai et al.
patent: D477677 (2001-09-01), Stirm
patent: D456233 (2002-04-01), Main

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