Method of and apparatus for testing,申请号US19320649337-传众专利搜索

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发明名称	Method of and apparatus for testing
摘要
申请公布号	US1977707(A)	申请公布日期	1934.10.23
申请号	US19320649337	申请日期	1932.12.29
申请人	WESTERN ELECTRIC COMPANY, INCORPORATED	发明人	WEITZER SOLLE J.
分类号	H04Q1/24	主分类号	H04Q1/24
代理机构		代理人
主权项
地址

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