Production of short electric waves,申请号US19290372405-传众专利搜索

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发明名称	Production of short electric waves
摘要
申请公布号	US1877872(A)	申请公布日期	1932.09.20
申请号	US19290372405	申请日期	1929.06.20
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	HOLLMANN HANS ERICH
分类号	H01J25/68	主分类号	H01J25/68
代理机构		代理人
主权项
地址

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