Air flow filter for use in testing or treatment of the...

Medical and laboratory equipment – Equipment for diagnosis – analysis – or treatment – Filter

Design Patent

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Design Patent

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D0441449

CLAIM:
The ornamental design for an air flow filter for use in testing or treatment of the respiratory function of patients, as shown and described.

REFERENCES:
patent: D. 267117 (1982-11-01), Rosenberg
patent: D. 305934 (1990-02-01), Sone
patent: D. 358213 (1995-05-01), Sutton et al.
patent: 3782083 (1974-01-01), Rosenberg
patent: 3932153 (1976-01-01), Byrns
patent: 4113627 (1978-09-01), Leason
patent: 5035236 (1991-07-01), Kanegaonkar
patent: 5195527 (1993-03-01), Hicks

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