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The ornamental design for a door lock, as shown and described.
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The broken lines in the drawings depict portions of the door lock that form no part of the claimed design.
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Apr 14 2020 | WEI, CHAOYI | ZHONGSHAN SMARTEK SECURITY TECHNOLOGY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 052482 | /0509 | |
Apr 23 2020 | ZHONGSHAN SMARTEK SECURITY TECHNOLOGY CO., LTD. | (assignment on the face of the patent) | / |
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