Photographic filter and like mount,申请号US19410380223-传众专利搜索

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发明名称	Photographic filter and like mount
摘要
申请公布号	US2284847(A)	申请公布日期	1942.06.02
申请号	US19410380223	申请日期	1941.02.24
申请人	JOHN RAYMOND ROBERT	发明人	RAYMOND ROBERT JOHN
分类号	G03B17/12	主分类号	G03B17/12
代理机构		代理人
主权项
地址

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