Multi chambered whistle

Details Multi chambered whistle Multi chambered whistle

2007-11-20

2007-11-20

Brooks, Cathron C. (Department: 2913)

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Design Patent

active

29276484

CLAIM:
The ornamental design for a multi chambered whistle, as shown and described.

REFERENCES:
patent: D96272 (1935-07-01), Neill
patent: D102543 (1936-12-01), Butterfield
patent: 4821670 (1989-04-01), Foxcroft et al.
patent: 5546887 (1996-08-01), Cameron
patent: 5816186 (1998-10-01), Shepherd
patent: D409939 (1999-05-01), Sharp et al.
patent: D410771 (1999-06-01), Chang
patent: D462917 (2002-09-01), Hills et al.
patent: D488085 (2004-04-01), Cheng
patent: D502421 (2005-03-01), Cheng

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