LOW-FREQUENCY IMPROVEMENT MATERIAL AND SPEAKER SYSTEM USING SAME | Patent Publication Number 20200031678

US 20200031678 A1
Patent Number-
Application Number16522699
Filled DateJul 26, 2019
Priority DateJul 26, 2019
Publication DateJan 30, 2020
Original Assignee
Current AssigneeAac Acoustic Technologies Shenzhen Co. Ltd.
Inventor/ApplicantsHezhi Wang
Hongshu Feng
Kun Tang
Jiqiang Dai
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