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经营范围
发明名称
Helicopter
摘要
申请公布号
US2422441(A)
申请公布日期
1947.06.17
申请号
US19430498811
申请日期
1943.08.16
申请人
SIGHTS ROBERT C
发明人
SIGHTS ROBERT C.
分类号
B64C27/28
主分类号
B64C27/28
代理机构
代理人
主权项
地址
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