Vorrichtung zur Verstärkung von Sprechströmen.,申请号ATD119894-传众专利搜索

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发明名称	Vorrichtung zur Verstärkung von Sprechströmen.
摘要
申请公布号	AT119894(B)	申请公布日期	1930.11.25
申请号	ATD119894	申请日期	1929.12.18
申请人	SCHMIDT MAKROPHON GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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