Apparatus for the manufacture of perforated records,申请号US19310549078-传众专利搜索

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发明名称	Apparatus for the manufacture of perforated records
摘要
申请公布号	US1978966(A)	申请公布日期	1934.10.30
申请号	US19310549078	申请日期	1931.07.06
申请人	SPRAGUE SIGNS, INC.	发明人	SPRAGUE FRANK J.
分类号	G09G3/00	主分类号	G09G3/00
代理机构		代理人
主权项
地址

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