Spark quenching arrangement,申请号US19380198182-传众专利搜索

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发明名称	Spark quenching arrangement
摘要
申请公布号	US2205602(A)	申请公布日期	1940.06.25
申请号	US19380198182	申请日期	1938.03.26
申请人	ASSOCIATED TELEPHONE & TELEGRAPH COMPANY	发明人	SAVILLE WILLIE
分类号	H04M1/74	主分类号	H04M1/74
代理机构		代理人
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