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The ornamental design for a portable refrigerator, as shown and described.
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The broken lines depict portions of the portable refrigerator that form no part of the claimed design.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Aug 12 2019 | TANG, LONGHUA | ACOSOLAR INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 050093 | /0577 |
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