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经营范围
发明名称
Collapsible stereoscope
摘要
申请公布号
US2690698(A)
申请公布日期
1954.10.05
申请号
US19520293727
申请日期
1952.06.16
申请人
DASCH FRANK E
发明人
DASCH FRANK E.
分类号
G02B27/22
主分类号
G02B27/22
代理机构
代理人
主权项
地址
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