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发明名称
Dual rotation propeller
摘要
申请公布号
US2421514(A)
申请公布日期
1947.06.03
申请号
US19430499240
申请日期
1943.08.19
申请人
GENERAL MOTOR CORPORATION
发明人
MARTIN THOMAS B.;BERNINGER KENNETH L.
分类号
B64C11/30
主分类号
B64C11/30
代理机构
代理人
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地址
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