Electrodynamic phonograph pickup,申请号US19470772359-传众专利搜索

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发明名称	Electrodynamic phonograph pickup
摘要
申请公布号	US2531242(A)	申请公布日期	1950.11.21
申请号	US19470772359	申请日期	1947.09.05
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	YENZER GEORGE R.
分类号	H04R9/12	主分类号	H04R9/12
代理机构		代理人
主权项
地址

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