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Kite patents filed in 1940.   Unless otherwise stated, the numbered patent is a US patent. We welcome patents from all nations and welcome volunteers to bring forward such patents.
  • 1940, May 7          Orla E. Bradford instructs an AWECS that converts the upper wind energy to sound via a turbine onboard the kite.    US Pat. 2240881    Yet same Bradford had the turbine in kite making noise in a filed instruction in 1930:  Patent number: 1824324 Filing date: Feb 20, 1930