Whistle

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible

Design Patent

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Design Patent

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D0622171

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

REFERENCES:
patent: D76516 (1928-10-01), Zisch
patent: D96272 (1935-07-01), Neill
patent: D102543 (1936-12-01), Butterfield
patent: D409939 (1999-05-01), Sharp et al.
patent: D488085 (2004-04-01), Cheng
patent: 2003/0033970 (2003-02-01), Hills et al.
patent: 2009/0178606 (2009-07-01), Wu

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