Seismograph,申请号US19390281958-传众专利搜索

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发明名称	Seismograph
摘要
申请公布号	US2304738(A)	申请公布日期	1942.12.08
申请号	US19390281958	申请日期	1939.06.29
申请人	SOCONY-VACUUM OIL COMPANY, INCORPORATED	发明人	MCCARTY MALCOLM D.
分类号	G01V1/18	主分类号	G01V1/18
代理机构		代理人
主权项
地址

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