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发明名称
Follow focus device
摘要
申请公布号
US2133063(A)
申请公布日期
1938.10.11
申请号
US19350028102
申请日期
1935.06.24
申请人
UNITED RESEARCH CORPORATION
发明人
TONDREAU ALBERT W.
分类号
G03B19/18
主分类号
G03B19/18
代理机构
代理人
主权项
地址
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