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About Hydrogen Engine Center, Inc. Hydrogen Engine Center, Inc. (HEC) designs, manufactures and distributes alternative-fueled internal combustion engines, engine controls and fuel delivery systems and power generation equipment for distributed power, agricultural, industrial, airport ground support, off-road vehicular, business and home applications. All HEC engines and power generation equipment are capable of running on a multitude of fuels, including but not limited to, hydrogen, ammonia, synthetic gas, coal bed methane, gasoline, and ethanol. HEC trades on the Bulletin Board under the symbol "HYEG.OB."