Rotation retarding device for a reel carrying shaft,申请号US19520297215-传众专利搜索

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发明名称	Rotation retarding device for a reel carrying shaft
摘要
申请公布号	US2777545(A)	申请公布日期	1957.01.15
申请号	US19520297215	申请日期	1952.07.05
申请人	COLUMBIA BROADCASTING SYSTEM, INC.	发明人	JR. JOHN F. ROCKETT,
分类号	B65H59/04	主分类号	B65H59/04
代理机构		代理人
主权项
地址

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