Phonograph pickup having a quadrilateral crystal with only one corner free to flex,申请号US19480059168-传众专利搜索

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发明名称	Phonograph pickup having a quadrilateral crystal with only one corner free to flex
摘要
申请公布号	US2547227(A)	申请公布日期	1951.04.03
申请号	US19480059168	申请日期	1948.11.09
申请人	PHILCO CORPORATION	发明人	O'NEAL CLEON D.
分类号	H04R17/04	主分类号	H04R17/04
代理机构		代理人
主权项
地址

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