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发明名称
Photographic device
摘要
申请公布号
US2245527(A)
申请公布日期
1941.06.10
申请号
US19380242028
申请日期
1938.11.23
申请人
GENERAL DEVICES CORPORATION
发明人
GRABFIELD JOHN J.
分类号
G03B27/62
主分类号
G03B27/62
代理机构
代理人
主权项
地址
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