Spool for photographic developing tanks,申请号US19460649336-传众专利搜索

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发明名称	Spool for photographic developing tanks
摘要
申请公布号	US2484341(A)	申请公布日期	1949.10.11
申请号	US19460649336	申请日期	1946.02.21
申请人	ROBERT C. BROWN, JR.	发明人	JR. JOHN C. GROVER,
分类号	G03D13/14	主分类号	G03D13/14
代理机构		代理人
主权项
地址

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