HNO International, Inc. engages in the design, integration, and development of green hydrogen-based clean energy technologies that can help communities decarbonize and reduce emissions. The company is headquartered in Murrieta, California. The company went IPO on 2006-12-15. The firm is focused on systems engineering design, integration, and product development to generate green hydrogen-based clean energy solutions to help businesses and communities decarbonize in the near term. Its products include Compact Hydrogen Refueling Station (CHRS), Hydrogen Carbon Cleaner (HCC), and Scalable Hydrogen Energy Platform (SHEP). The company provides green hydrogen systems engineering design, integration, and products to various markets, such as the zero-emission vehicle and mobile equipment market, consisting of hydrogen fuel cell electric passenger vehicles, material handling equipment such as forklifts and airport ground support equipment; the hydrogen gas markets encompassing ammonia, fertilizer, steel, mining, electronics, semiconductors, and fuel cell electric vehicles; and the gasoline and diesel engine emissions and maintenance reduction product and services market.