Manufacture of photographic filters,申请号US19560597270-传众专利搜索

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发明名称	Manufacture of photographic filters
摘要
申请公布号	US2887424(A)	申请公布日期	1959.05.19
申请号	US19560597270	申请日期	1956.07.11
申请人	INSTRUMENT GLASS CO. INC.	发明人	LANGBERG CHARLES
分类号	G02B5/22	主分类号	G02B5/22
代理机构		代理人
主权项
地址

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