David Hayden
4Patents
2h-index
12Co-inventors
45Inventor score
Filing activity: Nov 6, 1979 → Jan 8, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9561798B2 | Controlling internal combustion engine emissions | Emerging Cross-Sectional Technologies | 4 | Active |
| US8523200B2 | Sulky force equalizer and analyzer | Performing Operations; Transporting | 2 | Active |
| US4301654A | Pressurized fluid motor | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US11944553B2 | Expanding spinal fusion cage | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.