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发明名称
Optical level
摘要
申请公布号
US3013464(A)
申请公布日期
1961.12.19
申请号
US19550506112
申请日期
1955.05.05
申请人
KEUFFEL & ESSER COMPANY
发明人
KEUFFEL CARL W.;BAKER ALLISTER L.
分类号
G02B27/64
主分类号
G02B27/64
代理机构
代理人
主权项
地址
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