Piston and piston ring,申请号US19290355033-传众专利搜索

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发明名称	Piston and piston ring
摘要
申请公布号	US1813930(A)	申请公布日期	1931.07.14
申请号	US19290355033	申请日期	1929.04.15
申请人	JAMES JR THOMAS	发明人	JR. THOMAS JAMES,
分类号	F16J1/00	主分类号	F16J1/00
代理机构		代理人
主权项
地址

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