Microphone with carbon electrodes,申请号US19480041371-传众专利搜索

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发明名称	Microphone with carbon electrodes
摘要
申请公布号	US2572525(A)	申请公布日期	1951.10.23
申请号	US19480041371	申请日期	1948.07.29
申请人	ALBISWERK ZUERICH A. G.	发明人	ZURICH ERICH SCHIRCKS
分类号	H04R1/22;H04R21/02	主分类号	H04R1/22
代理机构		代理人
主权项
地址

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