Double key twist

Details Double key twist Double key twist

2007-10-02

2007-10-02

Seifert, Ralf (Department: 2914)

Design Patent

active

29256396

CLAIM:
The ornamental design for a double key twist.

REFERENCES:
patent: 3863477 (1975-02-01), Klein
patent: D235385 (1975-06-01), Smyth
patent: D318952 (1991-08-01), Stillwagon et al.
patent: D342384 (1993-12-01), MacDonald
patent: D360750 (1995-08-01), Stillwagon
patent: D369020 (1996-04-01), MacDonald
patent: D418971 (2000-01-01), Scungio

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