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Patents
Patents Assigned to Shenzhen Shangyuan Tech LTD
Patents Assigned to Shenzhen Shangyuan Tech LTD
Active noise cancelling wireless earphone
Patent number:
D822636
Type:
Grant
Filed:
January 4, 2017
Date of Patent:
July 10, 2018
Assignee:
Shenzhen Shangyuan Tech LTD
Inventor:
Zoey Liu