Backpack

Design Patent

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Design Patent

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D0517800

CLAIM:
The ornamental design for a backpack, as shown and described.

REFERENCES:
patent: 1397161 (1921-11-01), Clemetson
patent: 1588695 (1926-06-01), Boehm
patent: 4810102 (1989-03-01), Norton
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patent: 5957354 (1999-09-01), Mentken
patent: 6189750 (2001-02-01), Von Neumann
patent: D441528 (2001-05-01), Guyon
patent: D456601 (2002-05-01), Kegels
patent: D487189 (2004-03-01), Ukitsu et al.
patent: D497716 (2004-11-01), de Baschmakoff
patent: D498587 (2004-11-01), de Baschmakoff
patent: D498588 (2004-11-01), de Baschmakoff

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