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经营范围
发明名称
Variable pitch propeller
摘要
申请公布号
US2196654(A)
申请公布日期
1940.04.09
申请号
US19370171824
申请日期
1937.10.30
申请人
ENGINEERING AND RESEARCH CORP.
发明人
BERTRAN EDWARD M.
分类号
B64C11/36
主分类号
B64C11/36
代理机构
代理人
主权项
地址
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