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The ornamental design for a chair back frame, as shown and described.
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The broken lines showing of the screws in the drawing are for illustrative purposes only and form no part of the claimed design.
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Jun 17 2015 | TSAI, HSUAN-CHIN | ZHONGSHAN SHI SONGLIN FURNITURE CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 035860 | /0983 | |
Jun 18 2015 | Zhongshan Shi Songlin Furniture Co., Ltd. | (assignment on the face of the patent) | / |
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