Back rest for a chair

Design Patent

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Design Patent

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D0597772

CLAIM:
The ornamental design for a back rest for a chair, as shown and described.

REFERENCES:
patent: D495167 (2004-08-01), Chu
patent: D495509 (2004-09-01), Breen
patent: D511418 (2005-11-01), Breen
patent: D512232 (2005-12-01), Wu
patent: D512843 (2005-12-01), Breen
patent: D534365 (2007-01-01), Breen
patent: D535113 (2007-01-01), Wang
patent: D541562 (2007-05-01), Grove et al.
patent: D557024 (2007-12-01), Chen
patent: D557025 (2007-12-01), Chen
patent: D557913 (2007-12-01), Ong
patent: D572493 (2008-07-01), Zhang
patent: D573361 (2008-07-01), Kung

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