Apparatus for the study and testing participants of a study problem and a method of making same,申请号US19550531476-传众专利搜索

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发明名称	Apparatus for the study and testing participants of a study problem and a method of making same
摘要
申请公布号	US2961777(A)	申请公布日期	1960.11.29
申请号	US19550531476	申请日期	1955.08.30
申请人	VAN VALKENBURGH, NOOGER & NEVILLE, INC.	发明人	NEVILLE RICHARD S.;ROSEN NATHAN
分类号	G09B3/04	主分类号	G09B3/04
代理机构		代理人
主权项
地址

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