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Patent
   D329771
Priority
Aug 24 1989
Filed
Aug 24 1989
Issued
Sep 29 1992
Expiry
Sep 29 2006
Inventors
Zacharkow,…
Assg.orig
Assg.curr
Entity
unknown
Referenced by
3
References
10
Maint.:
n/a
The ornamental design for a adjustable backrest, as shown and described.

FIG. 1 is a front perspective view of an adjustable backrest, showing my new design; and,

FIG. 2 is a rear perspective view thereof.
INVENTORS:

Zacharkow, Dennis

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
6007150, Mar 08 1998 Milsco Manufacturing Company Motorcycle seat with adjustable backrest
6474743, Sep 18 2000 Crown Therapeutics, Inc. Wheelchair back support assembly
D341735, Oct 04 1990 Motorcycle backrest
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2802220,
3084978,
3880463,
4711492, May 06 1980 Chair back arrangement
480822,
4862536, Mar 07 1988 Back support device
4981325, Aug 25 1988 Posture support with multi-planar adjustment
238996,
D265390, Jun 09 1980 Yamaha Motor Corporation, U.S.A. Combined snowmobile luggage carrier and backrest
D300620, Apr 01 1986 Spastic Society of Victoria Limited Wheelchair locking unit for use in a vehicle
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