David Frank
26Patents
8h-index
26Co-inventors
71Inventor score
Filing activity: Jun 13, 2000 → Oct 1, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6833207B2 | Unitized regenerative fuel cell with bifunctional fuel cell humidifier and water electrolyzer | Emerging Cross-Sectional Technologies | 48 | Expired |
| US6852439B2 | Apparatus for and method of forming seals in fuel cells and fuel cell stacks | Emerging Cross-Sectional Technologies | 37 | Expired |
| US6727012B2 | Method and apparatus for generating hydrogen inside of a fuel cell | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6541141B1 | Water recovery in the anode side of a proton exchange membrane fuel cell | Emerging Cross-Sectional Technologies | 19 | Expired |
| US6737184B2 | Chemical hydride hydrogen generation system and an energy system incorporating the same | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6436563B1 | Water recovery, primarily in the cathode side, of a proton exchange membrane fuel cell | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7210220B2 | Apparatus for and method of forming seals in fuel cells and fuel stacks | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6602625B1 | Fuel cell with dual end plate humidifiers | Emerging Cross-Sectional Technologies | 8 | Expired |
| US7432008B2 | Gas diffusion layer for an electrochemical cell | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7045230B2 | Chemical hydride hydrogen generation system and fuel cell stack incorporating a common heat transfer circuit | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6878477B2 | Fuel cell flow field plate | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6946104B2 | Chemical hydride hydrogen generation system and an energy system incorporating the same | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6746789B1 | Catalytic humidifier and heater for the fuel stream of a fuel cell | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7138202B2 | Apparatus for and method of forming seals in fuel cells and fuel stacks | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7569303B2 | Membrane electrode assembly with modified catalyst layout | Emerging Cross-Sectional Technologies | 2 | Active |
| US6706429B1 | Catalytic humidifier and heater, primarily for humidification of the oxidant stream for a fuel cell | Emerging Cross-Sectional Technologies | 2 | Expired |
| US7338727B2 | Method of operating a fuel cell to provide a heated and humidified oxidant | Emerging Cross-Sectional Technologies | 2 | Expired |
| US9580825B2 | Electrolyzer cell stack system | Emerging Cross-Sectional Technologies | 1 | Active |
| US6936081B2 | Chemical hydride hydrogen reactor and generation system | Emerging Cross-Sectional Technologies | 1 | Expired |
| US8241810B2 | Racked power supply ventilation | Emerging Cross-Sectional Technologies | 1 | Active |
| US7348092B2 | Apparatus for and method of forming seals in fuel cells and fuel stacks | Emerging Cross-Sectional Technologies | 1 | Expired |
| US8563196B2 | Racked power supply ventilation | Emerging Cross-Sectional Technologies | 0 | Active |
| US6790546B2 | Method of heating and humidifying at least one of a fuel stream and an oxidant stream for a fuel cell | Emerging Cross-Sectional Technologies | 0 | Expired |
| US8419910B2 | Electrolyzer cell stack system | Emerging Cross-Sectional Technologies | 0 | Active |
| US6916567B2 | Regenerative dryer device and method for water recovery, primarily in the cathode side, of a proton exchange membrane fuel cell | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.