Hitzdraht-Mikrophon zum Empfang von Infratönen bis zu den tiefen hörbaren Tönen.,申请号CHD198767-传众专利搜索

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发明名称	Hitzdraht-Mikrophon zum Empfang von Infratönen bis zu den tiefen hörbaren Tönen.
摘要
申请公布号	CH198767(A)	申请公布日期	1938.07.15
申请号	CHD198767	申请日期	1937.10.12
申请人	SOCIETE TOURISTIQUE POUR LE NUMEROTAGE ET LA SIGNALISATION DES ROUTES S. A.	发明人	SOCIETE TOURISTIQUE POUR LE NUMEROTAGE ET LA SIGNALISATION DES ROUTES S. A.
分类号	H04R23/00	主分类号	H04R23/00
代理机构		代理人
主权项
地址

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