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发明名称
Direct positive camera adapter
摘要
申请公布号
US2592524(A)
申请公布日期
1952.04.15
申请号
US19490101748
申请日期
1949.06.28
申请人
GRANT PHOTO PRODUCTS, INC.
发明人
JR. GARNET P. GRANT,
分类号
G03B17/12
主分类号
G03B17/12
代理机构
代理人
主权项
地址
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