David Johnston
14Patents
10h-index
31Co-inventors
72Inventor score
Filing activity: May 10, 1976 → Jul 26, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8746533B2 | Surgical stapling device and method | Human Necessities | 1,254 | Active |
| US6494694B2 | Disposable infusion cassette with low air bubble retention and improved valves | Emerging Cross-Sectional Technologies | 211 | Expired |
| US5621603A | Pulse width modulated solenoid driver controller | Electricity | 140 | Expired |
| US6264222A | Retractable stairway assembly for a vehicle | Performing Operations; Transporting | 97 | Expired |
| US4114851A | High pressure valve | Mechanical Engineering; Lighting; Heating | 41 | Expired |
| US9579101B2 | Surgical stapling device and method | Human Necessities | 34 | Active |
| US6178364A | Method of controlling a retractable stairway assembly | Fixed Constructions | 30 | Expired |
| US6683509B2 | Voltage controlled oscillators | Electricity | 21 | Expired |
| US8352114B2 | Method and apparatus for docking a robotic device with a charging station | Physics | 19 | Active |
| US5774042A | Device for providing tactile indication of pedal position | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US10888349B2 | Medical device handles and related methods | Human Necessities | 8 | Active |
| US7441942B2 | System and method for applying an additive to a material stream | Emerging Cross-Sectional Technologies | 7 | Active |
| US6249482A | Synchronous memory | Physics | 7 | Expired |
| US6198678A | Semiconductor memories | Physics | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.