John E. Campbell
7Patents
4h-index
10Co-inventors
54Inventor score
Filing activity: Mar 2, 1978 → Feb 26, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4240077A | Thermostat | Physics | 32 | Expired |
| US6308986A | Restraint belt presenter | Performing Operations; Transporting | 24 | Expired |
| US4399428A | Thermostat | Physics | 21 | Expired |
| US6279954A | Restraint belt presenter having offset rotary action | Performing Operations; Transporting | 9 | Expired |
| US4303751A | Rupturable photographic processing alkaline fluid container | Physics | 4 | Expired |
| US4303750A | Alkaline fluid photographic processing composition containers | Emerging Cross-Sectional Technologies | 2 | Expired |
| US10947964B2 | System and method for precision fluid delivery | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.