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发明名称
Optical instrument
摘要
申请公布号
US2612893(A)
申请公布日期
1952.10.07
申请号
US19490103123
申请日期
1949.07.05
申请人
ENGELMANN OTTO R
发明人
ENGELMANN OTTO R.
分类号
G02B7/182;G02B27/22
主分类号
G02B7/182
代理机构
代理人
主权项
地址
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