Double-head screw

Details Double-head screw Double-head screw

2007-09-25

2007-09-25

Baynham, Holly H. (Department: 2915)

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

Design Patent

active

29240020

CLAIM:
We claim the ornamental design for a double-head screw, as shown and described.

REFERENCES:
patent: 1651796 (1927-12-01), Arenz
patent: 1908215 (1933-05-01), Berge
patent: 2372888 (1945-04-01), Duggan
patent: 3810279 (1974-05-01), Swick et al.
patent: D248824 (1978-08-01), Imai et al.
patent: D267627 (1983-01-01), Hultin
patent: D268006 (1983-02-01), Wollar
patent: D351335 (1994-10-01), Yazich
patent: 5540531 (1996-07-01), Choiniere
patent: D416475 (1999-11-01), DePrisco
patent: D455338 (2002-04-01), Moser
patent: D469007 (2003-01-01), Chen et al.

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