Vacuum operated counterbalance,申请号US19410408781-传众专利搜索

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发明名称	Vacuum operated counterbalance
摘要
申请公布号	US2351397(A)	申请公布日期	1944.06.13
申请号	US19410408781	申请日期	1941.08.29
申请人	DARRELL MARSDEN DOWDING;JOHN CUMMINGS TYLER	发明人	BUCHET CONRAD R.
分类号	F04B47/02	主分类号	F04B47/02
代理机构		代理人
主权项
地址

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