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CONTROLLABLE AIR DUCT FOR VERTICAL AND SHORT TAKE-OFF AND LANDING TYPE OF AIR VEHICLE
US 3,524,611 A
Filed
: 07/22/1968
Issued
: 08/18/1970
Est. Priority Date
: 07/22/1968
Status: Expired due to Term
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Current Assignee
Frank Kurt
Original Assignee
Frank Kurt
Inventors
FRANK KURT
Application Number
US04/746,478
Time in Patent Office
757 Days
Field of Search
US Class Current
244/53.00B
CPC Class Codes
B64C 11/001
Shrouded propellers
B64C 29/0033
the propellers being tiltab...
B64C 29/0075
the motors being tiltable r...
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