Collapsible backrest

Details Collapsible backrest Collapsible backrest

2011-07-19

2011-07-19

De, Mimosa (Department: 2913)

Design Patent

active

D0641563

CLAIM:
We claim the ornamental design for a collapsible backrest, as shown and described.

REFERENCES:
patent: 1842424 (1932-01-01), Ponten et al.
patent: D216788 (1970-03-01), Petersen
patent: D219377 (1970-12-01), Peery
patent: 3822424 (1974-07-01), Messer
patent: 4869553 (1989-09-01), Powell
patent: D343525 (1994-01-01), Wright
patent: D346280 (1994-04-01), Metter
patent: D360535 (1995-07-01), Sjoberg
patent: D368809 (1996-04-01), Fields
patent: D371250 (1996-07-01), Herman
patent: 5701979 (1997-12-01), Voich
patent: D388968 (1998-01-01), de Visser

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