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United States Patent D641,563
Matteson ,   et al. July 19, 2011

Collapsible backrest


CLAIM We claim the ornamental design for a collapsible backrest, as shown and described.
Inventors: Matteson; Nick (San Diego, CA), Pearson; Erick (San Diego, CA)
Assignee: ENcomfort Designs (San Diego, CA)
Appl. No.: D/351,621
Filed: December 8, 2009

Current U.S. Class: D6/368
Current International Class: 0601
Field of Search: D6/334-336,367,368,374,375,376,379,380,500-502 297/16.1,16.2,45,183.5,350,352,377,378.1,380,382,452.12,452.13 5/419

References Cited

U.S. Patent Documents
1842424 January 1932 Ponten et al.
D216788 March 1970 Petersen
D219377 December 1970 Peery
3822424 July 1974 Messer
4869553 September 1989 Powell
D343525 January 1994 Wright
D346280 April 1994 Metter
D360535 July 1995 Sjoberg
D368809 April 1996 Fields
D371250 July 1996 Herman
5701979 December 1997 Voich
D388968 January 1998 de Visser
Primary Examiner: De; Mimosa
Attorney, Agent or Firm: Biotech Beach Law Group PC


FIG. 1 is a left, rear, top perspective view of a collapsible backrest 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 elevational view thereof, the right elevational view being a mirror image of the left elevational view;

FIG. 5 is a top plan view thereof;

FIG. 6 is a left elevational view of the collapsible backrest folded to provide a collapsed position; and,

FIG. 7 is a left, front, top perspective view thereof.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design.

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