Air freshener for placement in a vent

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Air treatment

Patent

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2304

Patent

active

D04110021

REFERENCES:
patent: 5269723 (1993-12-01), Bender
patent: 5527493 (1996-06-01), McElfresh et al.
patent: 5603455 (1997-02-01), Lin

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