Improvements relating to piston-rings,申请号GB19390020932-传众专利搜索

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发明名称	Improvements relating to piston-rings
摘要
申请公布号	GB531345(A)	申请公布日期	1941.01.02
申请号	GB19390020932	申请日期	1939.07.19
申请人	WELLWORTHY PISTON RINGS LIMITED;FREDERICK BLACKITH;D. NAPIER & SON LIMITED;LESLIE FRANK HALL	发明人
分类号	F16J9/06	主分类号	F16J9/06
代理机构		代理人
主权项
地址

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