David McDonald
10Patents
5h-index
14Co-inventors
63Inventor score
Filing activity: Nov 7, 1983 → Jun 14, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6446442B1 | Heat exchanger for an electronic heat pump | Mechanical Engineering; Lighting; Heating | 92 | Expired |
| US6619044B2 | Heat exchanger for an electronic heat pump | Mechanical Engineering; Lighting; Heating | 49 | Expired |
| US4513771A | Air valve | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4683913A | Rotary air valve seal arrangement | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5982112A | Low pressure xenon lamp and driver circuitry for use in theatrical productions and the like | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5150012A | Low pressure xenon lamp and driver circuitry for use in theatrical productions and the like | Electricity | 5 | Expired |
| US6140778A | Low pressure xenon lamp and driver circuitry for use in theatrical productions and the like | Emerging Cross-Sectional Technologies | 1 | Expired |
| US10718661B2 | Integrated microfabricated vapor cell sensor with transparent body having two intersecting signal paths | Physics | 0 | Active |
| US7948184B2 | Vehicle testing lamp apparatus, system, and method | Physics | 0 | Active |
| US11193990B2 | Integrated microfabricated alkali vapor cell sensor with reduced heading error | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.