Telephony,申请号US19390270244-传众专利搜索

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发明名称	Telephony
摘要
申请公布号	US2265203(A)	申请公布日期	1941.12.09
申请号	US19390270244	申请日期	1939.04.26
申请人	HARTFORD NATIONAL BANK AND TRUST COMPANY	发明人	SIX WILLEM
分类号	H04Q1/446	主分类号	H04Q1/446
代理机构		代理人
主权项
地址

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