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经营范围
发明名称
Tandem rotor helicopter
摘要
申请公布号
US2507993(A)
申请公布日期
1950.05.16
申请号
US19460716494
申请日期
1946.12.16
申请人
PIASECKI HELICOPTER CORPORATION
发明人
PIASECKI FRANK N.
分类号
A63H27/133;B64C27/82
主分类号
A63H27/133
代理机构
代理人
主权项
地址
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