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发明名称
Photographic accessory
摘要
申请公布号
US2482479(A)
申请公布日期
1949.09.20
申请号
US19480037913
申请日期
1948.07.09
申请人
HAMILTON BURTON C
发明人
HAMILTON BURTON C.
分类号
G03D3/02
主分类号
G03D3/02
代理机构
代理人
主权项
地址
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