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发明名称
Apparatus for presenting information
摘要
申请公布号
US3218921(A)
申请公布日期
1965.11.23
申请号
US19630264488
申请日期
1963.03.12
申请人
LEVY
发明人
GROSVENOR KENNETH D. J.;LEVY MAURICE M.
分类号
B07C3/20;G06K17/00;G09B5/02
主分类号
B07C3/20
代理机构
代理人
主权项
地址
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