Electric wave filter,申请号US19310519408-传众专利搜索

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发明名称	Electric wave filter
摘要
申请公布号	US1853929(A)	申请公布日期	1932.04.12
申请号	US19310519408	申请日期	1931.03.02
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	RETTENMEYER FRANCIS X.
分类号	H03H7/01	主分类号	H03H7/01
代理机构		代理人
主权项
地址

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