Volume control,申请号US19290346112-传众专利搜索

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发明名称	Volume control
摘要
申请公布号	US1833041(A)	申请公布日期	1931.11.24
申请号	US19290346112	申请日期	1929.03.11
申请人	CHICAGO TELEPHONE SUPPLY COMPANY	发明人	SCHELLENGER NEWTON C.
分类号	H01C10/20;H01C10/32	主分类号	H01C10/20
代理机构		代理人
主权项
地址

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