Safety spectacle bridge lift,申请号US19460691937-传众专利搜索

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发明名称	Safety spectacle bridge lift
摘要
申请公布号	US2504524(A)	申请公布日期	1950.04.18
申请号	US19460691937	申请日期	1946.08.21
申请人	HAYWARD JAY W	发明人	HAYWARD JAY W.
分类号	G02C3/00	主分类号	G02C3/00
代理机构		代理人
主权项
地址

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