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The ornamental design for a portable bluetooth speaker, as shown and described.
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The fade-out portion surrounded by broken lines shown in the
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Oct 19 2017 | WANG, WEI | LIBRATONE A S | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 045158 | /0114 | |
| Nov 02 2017 | LIBRATONE A/S | (assignment on the face of the patent) | / | |||
| Dec 22 2020 | LIBRATONE A S | LITTLE BIRD APS | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 054770 | /0574 |
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