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发明名称
Photographic vacuum squeegee and negative holder
摘要
申请公布号
US2000390(A)
申请公布日期
1935.05.07
申请号
US19330703741
申请日期
1933.12.23
申请人
HUEBNER WILLIAM C
发明人
HUEBNER WILLIAM C.
分类号
G03B27/06
主分类号
G03B27/06
代理机构
代理人
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地址
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