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Hi,
the designer Harlan D. Fowler invented many airplanes new concepts;
https://www.google.com/patents/US2650049?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6wEIHTAA
https://www.google.com/patents/US2974899?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6wEIJjAB
https://www.google.com/patents/US2407774?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6wEILzAC
https://www.google.com/patents/US2950878?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6wEISjAF
https://www.google.com/patents/US2476538?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6AEIUjAG
https://www.google.com/patents/US3312426?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6AEIWzAH
the designer Harlan D. Fowler invented many airplanes new concepts;
https://www.google.com/patents/US2650049?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6wEIHTAA
https://www.google.com/patents/US2974899?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6wEIJjAB
https://www.google.com/patents/US2407774?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6wEILzAC
https://www.google.com/patents/US2950878?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6wEISjAF
https://www.google.com/patents/US2476538?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6AEIUjAG
https://www.google.com/patents/US3312426?dq=harlan+fowler+airplane&hl=ar&sa=X&ved=0ahUKEwimu9Hqzs_LAhVMaRQKHX4ZABQQ6AEIWzAH