Courtesy of Business Insider (Click Here)
U.S. Government Patent "Thrust Reaction Utilization Method
and System" (Click Here)
Awarded August 13, 2013.
"As a 30 year veteran of NASA, please allow me to say that the THRUST Concept is straight
forward in both development and construction. After all, it is not like the system has to be constructed in space 100 miles in orbit, but rather fixed ground based construction"
Hydrogen Utility Plants
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"Existing turbojet engines can be easily adapted to use hydrogen"
Technology Proven 1957 (See Item 7)