David P. Simpson
8Patents
5h-index
2Co-inventors
49Inventor score
Filing activity: Jul 9, 1974 → Dec 8, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4417132A | Apparatus for heating electrically conductive flowable media | Human Necessities | 30 | Expired |
| US4434357A | Apparatus for heating electrically conductive flowable media | Human Necessities | 28 | Expired |
| US5440667A | OHMIC heater including electrodes arranged along a flow axis to reduce leakage current | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US4085170A | Method and apparatus for increasing contact area in a multi-phase system | Emerging Cross-Sectional Technologies | 16 | Expired |
| US3987306A | Treatment of material by ultra-violet irradiation | Electricity | 5 | Expired |
| US4167209A | Boilers | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US3942018A | Production of ultra-violet radiation | Electricity | 2 | Expired |
| US4077465A | Boilers | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.