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发明名称
Control mechanism for helicopters having coaxial counterrotating rotors
摘要
申请公布号
US2427936(A)
申请公布日期
1947.09.23
申请号
US19430502903
申请日期
1943.09.18
申请人
WALES JR NATHANIEL B
发明人
JR. NATHANIEL B. WALES,
分类号
B64C27/54
主分类号
B64C27/54
代理机构
代理人
主权项
地址
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