Automatic switching device,申请号US19290366281-传众专利搜索

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发明名称	Automatic switching device
摘要
申请公布号	US1919378(A)	申请公布日期	1933.07.25
申请号	US19290366281	申请日期	1929.05.27
申请人	G. CURTIS BIRD	发明人	PEPIN JOSEPH N.
分类号		主分类号
代理机构		代理人
主权项
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