Dual action lift spring,申请号US19540416866-传众专利搜索

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发明名称	Dual action lift spring
摘要
申请公布号	US2749570(A)	申请公布日期	1956.06.12
申请号	US19540416866	申请日期	1954.03.17
申请人	ALDER CLAYTON W	发明人	ALDER CLAYTON W.
分类号	E05F1/16	主分类号	E05F1/16
代理机构		代理人
主权项
地址

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