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发明名称
PROJECTION SCREEN
摘要
申请公布号
US3561840(A)
申请公布日期
1971.02.09
申请号
USD3561840
申请日期
1968.06.03
申请人
HITACHI LTD.
发明人
TAKEO SEKI;MASUO FUKUMURA;HAJIME FUKKE
分类号
G02B5/126;G03B21/60;(IPC1-7):G03B21/60
主分类号
G02B5/126
代理机构
代理人
主权项
地址
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