| Annual U.S. Hydrogen Conference | | Annual meeting of the National Hydrogen Association, covering many of the emerging research and developments in hydrogen technologies, such as fuel cells, storage, and hydrogen production. |
| Arizona Hydrogen | | Manufactures a range of gas generators for the production of hydrogen and oxygen . |
| Atomic Hydrogen Source | | The H-flux Atomic Hydrogen Source thermally dissociates hydrogen in an electron bombardment heated tungsten capillary. Used for surface science and thin film technology. |
| Coval H2 Partners | | California company integrating battery-powered and hybrid-electric vehicles and stationary power systems. Overview of current and future application areas. |
| Elettronica Todescato | | Production generators of hydrogen and oxygen that produce the two gases with the solo use of electric energy and water. |
| Energy Consultants, LLP | | Offers business advisory services for harvesting revenue from fuel cell, hydrogen, wind power and other emerging energy or renewable energy technologies. |
| ForeverGreen Enterprises, Inc. | | Aims to provide technology for converting waste materials into hydrogen using a plasma-based process. Overview of business, applications, and technology. |
| General Hydrogen | | Develops technologies and invests in companies for hydrogen infrastructure. |
| H2Gen Innovations Inc. | | Dedicated to developing, manufacturing and bringing to market low-cost, small-scale hydrogen generators for industrial applications and for the emerging fuel cell vehicle and distributed fuel cell power generation markets. |
| H2scan | | Offers solid-state sensors and process monitors able to quantify hydrogen without cross-sensitivities to other substances. |
| Hera Hydrogen Storage Systems | | Specializes in reversible metal hydride alloys and their applications, including hydrogen storage and thermal hydrogen compression. |
| Hydro-gen | | Offers skid-mounted catalytic steam reforming units for converting hydrocarbons to hydrogen, especially for use in fuel cells. Located in Italy. |
| HydroFuel Systems, Inc. | | Texas company provides promotional information about their eCell electrolysis technology, and possible applications. |
| Hydrogen Power Inc. | | Developing hydrogen supply systems based on reacting water with aluminum to form aluminum oxide. |
| Hydrogen Technology Applications, Inc. | | Company commercializing novel water electrolysis technology, claimed to be more energy-efficient than traditional electrolysis. Currently marketing a hydrogen gas generator welder. |
| HyRadix | | Develops fuel processing technology for producing hydrogen for fuel cells and industrial applications, aimed at residential and small industrial markets. |
| MRT | | Developer of a fluidized-bed membrane reactor process to produce pure hydrogen from natural gas in a single step. Overview of technology, industrial and fuel-cell applications, and company profile. |
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