Telephone sub-station including microphone amplifier,申请号US19570695148-传众专利搜索

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发明名称	Telephone sub-station including microphone amplifier
摘要
申请公布号	US3046353(A)	申请公布日期	1962.07.24
申请号	US19570695148	申请日期	1957.11.07
申请人	AUTOPHON AKTIENGESELLSCHAFT	发明人	TSCHUMI OTTO;KAPPELER HANS;STREIT RUDOLF
分类号	H04M1/50;H04M19/04	主分类号	H04M1/50
代理机构		代理人
主权项
地址

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