Automatic gas control and oil saver,申请号US19290355108-传众专利搜索

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发明名称	Automatic gas control and oil saver
摘要
申请公布号	US1836508(A)	申请公布日期	1931.12.15
申请号	US19290355108	申请日期	1929.04.15
申请人	WILLIAM A. TROUT	发明人	RASMUSSEN CHESTER A.
分类号	E21B33/06	主分类号	E21B33/06
代理机构		代理人
主权项
地址

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