Patent
   D471278
Priority
May 03 2002
Filed
May 03 2002
Issued
Mar 04 2003
Expiry
Mar 04 2017
Assg.orig
Entity
unknown
3
8
n/a
The ornamental design for an oxygen concentrator, as shown.

FIG. 1 is a front-right-top perspective view of an oxygen concentrator, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Cheng, Ming-Chuan

Patent Priority Assignee Title
D835290, Jul 21 2017 Medical oxygen concentrator
D854691, May 22 2018 NITERRA CO , LTD Medical oxygen concentrator
D861874, May 15 2018 NITERRA CO , LTD Medical oxygen concentrator
Patent Priority Assignee Title
4378982, Aug 28 1981 JOHN BUNN COMPANY, THE Compact oxygen concentrator
4502873, Jul 27 1982 PROTO-MED, INC Method and apparatus for concentrating oxygen
4545790, Aug 11 1983 Bio-Care, Incorporated Oxygen concentrator
6212904, Nov 01 1999 Respironics, Inc Liquid oxygen production
D284026, Jun 07 1985 JOHN BUNN COMPANY, THE Oxygen concentrator
D284695, Nov 01 1983 JOHN BUNN COMPANY, THE Oxygen concentrator
D329288, Nov 15 1989 Puritan-Bennett Corporation Cabinet for an oxygen concentrator
D412577, Oct 06 1997 COBHAM MISSION SYSTEMS DAVENPORT LSS INC Oxygen concentrator used in home health care
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