David Johnson
5Patents
5h-index
12Co-inventors
56Inventor score
Filing activity: Sep 10, 1993 → Aug 28, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5394732A | Method and apparatus for ultrasonic detection of air bubbles | Physics | 192 | Expired |
| US7300197B2 | Apparatus for dissolving a solid material in a liquid | Performing Operations; Transporting | 11 | Active |
| US6891286B2 | Magnetostrictive actuator | Electricity | 9 | Expired |
| US7103190B2 | Acoustic device | Electricity | 8 | Expired |
| US7620193B2 | Acoustic actuators | Electricity | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.