Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Air treatment
Design Patent
2000-05-17
2001-03-27
Lichtenstein, Lisa (Department: 2911)
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Air treatment
Design Patent
active
D0439646
CLAIM:
The ornamental design for an air filter cleaning device, as shown and described.
REFERENCES:
patent: 3733639 (1973-05-01), Timian
patent: 3958296 (1976-05-01), Fell
patent: 5182832 (1993-02-01), McMahon
Brown Martin Haller & McClain LLP
Lichtenstein Lisa
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