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发明名称
Projecting device
摘要
申请公布号
US2328616(A)
申请公布日期
1943.09.07
申请号
US19400356335
申请日期
1940.09.11
申请人
SPENCER LENS COMPANY
发明人
COCKBURN WILBERT M.
分类号
G03B21/06
主分类号
G03B21/06
代理机构
代理人
主权项
地址
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