Control circuit for step-by-step switches,申请号US19440564139-传众专利搜索

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发明名称	Control circuit for step-by-step switches
摘要
申请公布号	US2542794(A)	申请公布日期	1951.02.20
申请号	US19440564139	申请日期	1944.11.18
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	BROWN HENRY B.
分类号	F42D1/05;G08C19/20	主分类号	F42D1/05
代理机构		代理人
主权项
地址

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