SECTIONAL ELECTROSTATIC SOUND PRODUCERS,申请号CAD305228-传众专利搜索

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发明名称	SECTIONAL ELECTROSTATIC SOUND PRODUCERS
摘要
申请公布号	CA305228(A)	申请公布日期	1930.10.28
申请号	CAD305228	申请日期
申请人	THE UNITED REPRODUCERS PATENTS CORPORATION	发明人	VALENTINE F. GREAVES
分类号		主分类号
代理机构		代理人
主权项
地址

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