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Fluid sustained and fluid propelled aircraft
US 2,918,231 A
Filed
: 09/17/1956
Issued
: 12/22/1959
Est. Priority Date
: 09/17/1956
Status: Expired due to Term
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Current Assignee
Alexander M. Lippisch
Original Assignee
Alexander M. Lippisch
Inventors
Lippisch, Alexander M.
Application Number
US03/611,410
Time in Patent Office
1,191 Days
Field of Search
US Class Current
244/23.00R
CPC Class Codes
B64C 29/0025
the propellers being fixed ...
B64C 39/062
having annular wings
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