Lens retaining device,申请号US19350042373-传众专利搜索

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发明名称	Lens retaining device
摘要
申请公布号	US2056153(A)	申请公布日期	1936.10.06
申请号	US19350042373	申请日期	1935.09.27
申请人	BELSON MANUFACTURING CO.	发明人	BELSON MILTON J.
分类号	F21V17/00	主分类号	F21V17/00
代理机构		代理人
主权项
地址

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