Electrical switching system,申请号US19370155043-传众专利搜索

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发明名称	Electrical switching system
摘要
申请公布号	US2217064(A)	申请公布日期	1940.10.08
申请号	US19370155043	申请日期	1937.07.22
申请人	ASSOCIATED TELEPHONE & TELEGRAPH COMPANY	发明人	MACKENZIE JOHN FRANCIS
分类号	G01D11/28	主分类号	G01D11/28
代理机构		代理人
主权项
地址

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