Selective signaling system,申请号US19330655216-传众专利搜索

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发明名称	Selective signaling system
摘要
申请公布号	US2062822(A)	申请公布日期	1936.12.01
申请号	US19330655216	申请日期	1933.02.04
申请人	GENERAL RAILWAY SIGNAL COMPANY	发明人	POWELL WINFRED T.
分类号	H04M11/04	主分类号	H04M11/04
代理机构		代理人
主权项
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