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发明名称
PHOTOGRAPHIC NEGATIVE SYSTEM
摘要
申请公布号
CA336952(A)
申请公布日期
1933.11.07
申请号
CAD336952
申请日期
申请人
THE DUPONT FILM MANUFACTURING CORPORATION
发明人
VIRGIL B. SEASE
分类号
主分类号
代理机构
代理人
主权项
地址
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