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The ornamental design for a keyboard, as shown and described.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Oct 04 2019 | CHAN, CHI-WAI | KYE SYSTEMS CORP | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 051055 | /0384 | |
| Nov 19 2019 | KYE Systems Corp. | (assignment on the face of the patent) | / |
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