Helmet bell

Details Helmet bell Helmet bell

2007-12-03

2008-10-14

Spear, Robert M. (Department: 2913)

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Design Patent

active

D0578426

CLAIM:
The ornamental design for a helmet bell, as shown and described.

REFERENCES:
patent: D279873 (1985-07-01), Neely
patent: D346986 (1994-05-01), Friess, Jr.
patent: D369985 (1996-05-01), Kehler
patent: D373547 (1996-09-01), Stratford
patent: D389422 (1998-01-01), Lin
patent: D404671 (1999-01-01), Stannard
patent: D408313 (1999-04-01), Friess
patent: D419098 (2000-01-01), Evans
patent: D420613 (2000-02-01), Williams
patent: D432936 (2000-10-01), Wing et al.
patent: D470788 (2003-02-01), Friess
patent: D504346 (2005-04-01), Cavazos
patent: 2004/0083876 (2004-05-01), Maegli et al.

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