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The ornamental design for a heater, as shown and described.
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The evenly-spaced broken lines shown in the figures depict portions of the heater that form no part of the claimed design. The dash-dot broken lines showing the enlargements in
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Aug 24 2020 | Wenjun, Xie | (assignment on the face of the patent) | / |
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