Variable electrical apparatus,申请号US19260132080-传众专利搜索

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发明名称	Variable electrical apparatus
摘要
申请公布号	US1805229(A)	申请公布日期	1931.05.12
申请号	US19260132080	申请日期	1926.08.28
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	ATWOOD GEORGE F.
分类号	H01G5/06	主分类号	H01G5/06
代理机构		代理人
主权项
地址

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