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Jan Gulak claims that cars can run "on steam" and even airplanes can fly. In 2003, he patented his invention. The entry in the "Patent Office Bulletin" reads: "The invention concerns the combustion of superheated steam in high-pressure internal combustion piston engines with simultaneous combustion of other flammable liquid or gaseous substances. The invention can be used in all internal combustion piston engines (and perhaps also in jet engines).