Oxygen concentrator

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

Design Patent

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Design Patent

active

D0471982

CLAIM:
The ornamental design for an oxygen concentrator, as shown and described.

REFERENCES:
patent: 4378982 (1983-04-01), McCombs
patent: 4502873 (1985-03-01), Mottram et al.
patent: 4545790 (1985-10-01), Miller et al.
patent: D284026 (1986-05-01), McCombs
patent: D284695 (1986-07-01), McCombs
patent: D329288 (1992-09-01), Miller et al.
patent: D412577 (1999-08-01), Mickelson et al.
patent: 6212904 (2001-04-01), Arkharov et al.

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