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经营范围
发明名称
Negative integrator
摘要
申请公布号
US2172220(A)
申请公布日期
1939.09.05
申请号
US19360105691
申请日期
1936.10.15
申请人
ORELUP JOHN W
发明人
ORELUP JOHN W.
分类号
G03B27/72
主分类号
G03B27/72
代理机构
代理人
主权项
地址
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