Annular headphone | Patent Publication Number 20190215592

US 20190215592 A1
Patent NumberUS 10419840 B2
Application Number15867296
Filled DateJan 10, 2018
Priority DateJan 10, 2018
Publication DateJul 11, 2019
Inventor/ApplicantsYI-SHUN CHEN
HO-LUNG LU
Ho-Lung Lu
Yi-Shun Chen
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