Winding means for spring motors,申请号US19280245922-传众专利搜索

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发明名称	Winding means for spring motors
摘要
申请公布号	US1831070(A)	申请公布日期	1931.11.10
申请号	US19280245922	申请日期	1928.01.11
申请人	THE BELL & HOWELL COMPANY	发明人	HOWELL ALBERT S.
分类号	F03G1/00	主分类号	F03G1/00
代理机构		代理人
主权项
地址

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