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The ornamental design for the chair back, as shown and described.
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FIG. 1 is a front perspective view of the chair back.
FIG. 2 is a back perspective view of the chair back.
FIG. 3 is a right elevation view of the chair back.
FIG. 4 is a left elevation view of the chair back.
FIG. 5 is a front elevation view of the chair back.
FIG. 6 is a back elevation view of the chair back; and,
FIG. 7 is a top plan view of the chair back.
The broken lines shown in the drawing are for illustrative purposes only and form no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Mar 01 2004 | HARLEY, ALEX | Allseating Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016107 | /0419 | |
| Jun 07 2004 | Allseating Corporation | (assignment on the face of the patent) | / |
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