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发明名称
Projecting device
摘要
申请公布号
US2072286(A)
申请公布日期
1937.03.02
申请号
US19350053377
申请日期
1935.12.07
申请人
WELLINGTON BARRETT R
发明人
WELLINGTON BARRETT R.
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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