VISUAL AID FOR BLIND PERSONS FOR ENVIRONMENT IDENTIFICATION,申请号CAD818721-传众专利搜索

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发明名称	VISUAL AID FOR BLIND PERSONS FOR ENVIRONMENT IDENTIFICATION
摘要
申请公布号	CA818721(A)	申请公布日期	1969.07.22
申请号	CAD818721	申请日期
申请人	NATIONAL RESEARCH DEVELOPMENT CORPORATION	发明人	DAVID B. FOSTER
分类号		主分类号
代理机构		代理人
主权项
地址

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