William A. Null
24Patents
14h-index
9Co-inventors
74Inventor score
Filing activity: Oct 27, 2000 → Jul 15, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6554086B1 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 112 | Expired |
| US6851711B2 | Vehicle having an anti-dive/lockout mechanism | Performing Operations; Transporting | 82 | Expired |
| US7083195B2 | Suspension with releasable locking system | Performing Operations; Transporting | 65 | Expired |
| US7293801B2 | Self-stabilizing suspension for wheeled vehicles | Emerging Cross-Sectional Technologies | 61 | Active |
| US8172016B2 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 56 | Active |
| US6935448B2 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 54 | Expired |
| US6923280B2 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 54 | Expired |
| US7219755B2 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 49 | Expired |
| US7597163B2 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 45 | Active |
| US8062003B2 | System and method for providing oxygen | Human Necessities | 42 | Active |
| US8534679B2 | Suspension for wheeled vehicles | Emerging Cross-Sectional Technologies | 22 | Active |
| US8833774B2 | Suspension for wheeled vehicles | Emerging Cross-Sectional Technologies | 19 | Active |
| US9364377B2 | Suspension for wheeled vehicles | Emerging Cross-Sectional Technologies | 19 | Active |
| US9987177B2 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 15 | Active |
| US9925100B2 | Suspension for wheeled vehicles | Emerging Cross-Sectional Technologies | 10 | Active |
| US9149398B2 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 9 | Active |
| US10512572B2 | Suspension for wheeled vehicles | Emerging Cross-Sectional Technologies | 9 | Active |
| US8636089B2 | Obstacle traversing wheelchair | Emerging Cross-Sectional Technologies | 8 | Active |
| US7419182B2 | Mobility aid | Human Necessities | 4 | Active |
| US9624918B2 | Pumping device | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US11213441B2 | Suspension for wheeled vehicles | Emerging Cross-Sectional Technologies | 1 | Active |
| US9061238B2 | Gas concentrator | Emerging Cross-Sectional Technologies | 0 | Active |
| US12172121B2 | System and method for concentrating gas | Performing Operations; Transporting | 0 | Active |
| US12226733B2 | Systems and methods for concentrating gas | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.