Verfahren und Vorrichtung zur photographischen Schallaufzeichnung.,申请号CHD175069-传众专利搜索

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发明名称	Verfahren und Vorrichtung zur photographischen Schallaufzeichnung.
摘要
申请公布号	CH175069(A)	申请公布日期	1935.02.15
申请号	CHD175069	申请日期	1931.08.14
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	发明人	INC. ELECTRICAL RESEARCH PRODUCTS
分类号		主分类号
代理机构		代理人
主权项
地址

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