GENEVA, Feb. 2 -- XU, Changxin (Liangshan Jinguan Yihaogongguan 8-3602Jining, Shandong 272600), 徐长鑫 (中国山东省济宁市梁山县金冠壹号公馆8-3602) filed a patent application (PCT/CN2023/108769) for "COMPOSITE MICROPHONE" on Jul 22, 2023. With publication no. WO/2025/020019, the details related to the patent application was published on Jan 30, 2025.
Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is managed by the World Intellectual Property Organization (WIPO).
Inventor(s): XU, Changxin (Liangshan Jinguan Yihaogongguan 8-3602Jining, Shandong 272600), 徐...