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The ornamental design for a keyboard sterilizer, as shown and described.
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1. Keyboard sterilizer
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| ER4740, |
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 12 2020 | BNSOFT, INC. | (assignment on the face of the patent) | / | |||
| Jul 15 2022 | PARK, SANG KEUN | BNSOFT, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 060528 | /0168 |
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