Norman Freeman
5Patents
4h-index
5Co-inventors
50Inventor score
Filing activity: Jun 14, 1976 → Feb 4, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6519539B1 | Measurement of fuel cell impedance | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4065872A | Receptacle for insecticide or repellent | Human Necessities | 25 | Expired |
| US6816797B2 | System and method for measuring fuel cell voltage and high frequency resistance | Emerging Cross-Sectional Technologies | 19 | Expired |
| US7425832B2 | System and method for measuring internal resistance of electrochemical devices | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7148654B2 | Method and apparatus for monitoring fuel cell voltages | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.