Spiral fish ladder,申请号US19580772617-传众专利搜索

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发明名称	Spiral fish ladder
摘要
申请公布号	US3038314(A)	申请公布日期	1962.06.12
申请号	US19580772617	申请日期	1958.11.07
申请人	NORMAN HULTMAN ANDREW	发明人	HULTMAN ANDREW NORMAN
分类号	A01K61/00;E02B8/08	主分类号	A01K61/00
代理机构		代理人
主权项
地址

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