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Ducted fan aircraft
US 2,988,301 A
Filed
: 10/28/1958
Issued
: 06/13/1961
Est. Priority Date
: 10/28/1958
Status: Expired due to Term
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Current Assignee
Charles J. Fletcher
Original Assignee
Charles J. Fletcher
Inventors
Fletcher, Charles J.
Application Number
US03/770,231
Time in Patent Office
959 Days
Field of Search
US Class Current
244/12.3
CPC Class Codes
B64C 29/0025
the propellers being fixed ...
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