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发明名称
Projection device
摘要
申请公布号
US3056334(A)
申请公布日期
1962.10.02
申请号
US19580708494
申请日期
1958.01.13
申请人
CHRISTENSEN JOSEPH M
发明人
CHRISTENSEN JOSEPH M.
分类号
G03B21/00
主分类号
G03B21/00
代理机构
代理人
主权项
地址
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