Papermaking,申请号US19400353829-传众专利搜索

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法人/股东/高管

发明名称	Papermaking
摘要
申请公布号	US2335830(A)	申请公布日期	1943.11.30
申请号	US19400353829	申请日期	1940.08.23
申请人	SPENCER SPECIALTIES INC.	发明人	SPENCER JOHN A.
分类号	D21F1/46	主分类号	D21F1/46
代理机构		代理人
主权项
地址

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