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经营范围
发明名称
Helicopter rotor
摘要
申请公布号
US2604950(A)
申请公布日期
1952.07.29
申请号
US19460664267
申请日期
1946.04.23
申请人
SIPE CHARLES O
发明人
SIPE CHARLES O.
分类号
B64C39/00
主分类号
B64C39/00
代理机构
代理人
主权项
地址
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