Method and attachment to photographic enlarging machines for making pictures,申请号US19330692290-传众专利搜索

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发明名称	Method and attachment to photographic enlarging machines for making pictures
摘要
申请公布号	US2019498(A)	申请公布日期	1935.11.05
申请号	US19330692290	申请日期	1933.10.05
申请人	KRUG FREDERICK H	发明人	KRUG FREDERICK H.
分类号	G03B27/72	主分类号	G03B27/72
代理机构		代理人
主权项
地址

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