Phonograph pickup device and the like,申请号US19480041773-传众专利搜索

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发明名称	Phonograph pickup device and the like
摘要
申请公布号	US2658763(A)	申请公布日期	1953.11.10
申请号	US19480041773	申请日期	1948.07.31
申请人	RADIO CORPORATION OF AMERICA	发明人	ROYS HENRY E.
分类号	H04R1/16;H04R11/08	主分类号	H04R1/16
代理机构		代理人
主权项
地址

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