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发明名称
Spool holding and tensioning device for cameras
摘要
申请公布号
US2253090(A)
申请公布日期
1941.08.19
申请号
US19390302895
申请日期
1939.11.04
申请人
EASTMAN KODAK COMPANY
发明人
PETERSON CHARLES W.
分类号
G03B19/04
主分类号
G03B19/04
代理机构
代理人
主权项
地址
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