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Ferrofluid speaker

66
Assignee: ZHANG CHUNJIEPriority: Jan 16, 2023Filed: Apr 12, 2023Granted: Oct 1, 2024
Est. expiryJan 16, 2043(~16.5 yrs left)· nominal 20-yr term from priority
Inventors:Chunjie ZhangYunqin Xu
66
PatentIndex Score
5
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16
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1
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Claims

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CLAIM 
     
       The ornamental design for a ferrofluid speaker, as shown and described.

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