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发明名称
Air-pressure differential creating device
摘要
申请公布号
US2464797(A)
申请公布日期
1949.03.22
申请号
US19470758173
申请日期
1947.06.30
申请人
JESSIE A. DAVIS FOUNDATION, INC.
发明人
DAVIS JOHN H.
分类号
B63H7/00;B64C23/00
主分类号
B63H7/00
代理机构
代理人
主权项
地址
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