US Patent 11950049 Acoustic reflector, speaker unit, and chair
Is a
Date Filed
March 26, 2020
0
Date of Patent
April 2, 2024
0
Patent Application Number
17608554
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Patent Inventor Names
Takahiro Hayasaka
0
Daisaku Matsufuji
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Tsutomu Toyoguchi
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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