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发明名称
Focusing device
摘要
申请公布号
US1854665(A)
申请公布日期
1932.04.19
申请号
US19300492811
申请日期
1930.11.01
申请人
CLAVELOUX PARKER FRANK
发明人
PARKER FRANK CLAVELOUX
分类号
G03B13/18
主分类号
G03B13/18
代理机构
代理人
主权项
地址
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