Proton makes HOGEN hydrogen generators and UNIGEN regenerative fuel cell systems. Proton's HOGEN hydrogen generators make high purity, process pressure hydrogen from water and electricity for diverse uses in semiconductors, metallurgy, electrical generator cooling, meteorology and fuel cell applications. \r\n\r\nProton's UNIGEN fuel cell systems have the potential to capture, store and release electrical energy more cost effectively and efficiently than batteries or other alternatives.