Operation indicator of a heater

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Visual

Design Patent

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Design Patent

active

D0530236

CLAIM:
The ornamental design for an operation indicator of a heater, as shown and described.

REFERENCES:
patent: D427533 (2000-07-01), Cowan et al.
patent: D429323 (2000-08-01), Rossman et al.
patent: D437795 (2001-02-01), Fischer
patent: D505997 (2005-06-01), Maegawa
patent: 1103387 (2001-03-01), None
patent: 1131920 (2002-01-01), None
patent: 1178885 (2003-07-01), None

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