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发明名称
Film gate
摘要
申请公布号
US2085919(A)
申请公布日期
1937.07.06
申请号
US19330700808
申请日期
1933.12.04
申请人
RADIO CORPORATION OF AMERICA
发明人
MAY RUSSELL P.
分类号
G03B1/56;G03B31/00
主分类号
G03B1/56
代理机构
代理人
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地址
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