James H. Simpson
5Patents
3h-index
13Co-inventors
54Inventor score
Filing activity: Jun 5, 1980 → Nov 8, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4473297A | Ring laser gyroscope utilizing phase detector for minimizing beam lock-in | Electricity | 16 | Expired |
| US4327327A | All-angle gradient magnetometer | Physics | 15 | Expired |
| US4899932A | Capped highway grade crossing | Fixed Constructions | 6 | Expired |
| US10356889B1 | Passive method for controlling and correcting energy correlations in charged particle beams | Electricity | 0 | Active |
| US4433221A | Impedance contact assembly for an electric circuit breaker | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.