Focusing hood for photographic cameras,申请号US19510209970-传众专利搜索

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发明名称	Focusing hood for photographic cameras
摘要
申请公布号	US2641955(A)	申请公布日期	1953.06.16
申请号	US19510209970	申请日期	1951.02.08
申请人	FRANKE & HEIDECKE	发明人	BRETTHAUER HERMANN
分类号	G03B13/20	主分类号	G03B13/20
代理机构		代理人
主权项
地址

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