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发明名称
FILM VIEWER
摘要
申请公布号
US3672756(A)
申请公布日期
1972.06.27
申请号
USD3672756
申请日期
1969.12.11
申请人
METAGRAPHIC SYSTEMS INC.
发明人
WILLIAM CHARLES KINSINGER
分类号
G03B21/11;(IPC1-7):G03B21/11
主分类号
G03B21/11
代理机构
代理人
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