David Grant
28Patents
6h-index
12Co-inventors
66Inventor score
Filing activity: Apr 12, 1982 → Dec 15, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9353606B2 | Downhole method and apparatus | Fixed Constructions | 18 | Active |
| US10718183B2 | Downhole apparatus for disrupting filter cake | Fixed Constructions | 16 | Active |
| US7284781B2 | Tailgate ramp and method for providing access to a vehicle | Performing Operations; Transporting | 15 | Expired |
| US10975660B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 11 | Active |
| US4667782A | Cable handling system | Electricity | 10 | Expired |
| US7261323B2 | Fuel damper | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4453402A | Method and apparatus for determining the position of a piston in the cylinder of a reciprocating engine | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US4619602A | Fail safe automatic flue damper mechanism | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US11542779B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 1 | Active |
| US10613691B2 | Downhole apparatus | Electricity | 1 | Active |
| US10400553B2 | Downhole apparatus | Fixed Constructions | 1 | Active |
| US10337297B2 | Downhole method and apparatus | Fixed Constructions | 1 | Active |
| US9358745B2 | Compactor | Performing Operations; Transporting | 0 | Active |
| US9940488B2 | Dual video pipe with overlap filtering | Physics | 0 | Active |
| US10967596B2 | Baler with platen bypass prevention features | Performing Operations; Transporting | 0 | Active |
| US12006790B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 0 | Active |
| US11828134B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 0 | Active |
| US12012825B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 0 | Active |
| US11920433B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 0 | Active |
| US9851852B2 | Downhole apparatus | Electricity | 0 | Active |
| US12037873B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 0 | Active |
| US11215037B2 | Downhole apparatus | Fixed Constructions | 0 | Active |
| US11920434B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 0 | Active |
| US9708893B2 | Downhole method and apparatus | Fixed Constructions | 0 | Active |
| US11946339B2 | Downhole apparatus with a valve arrangement | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.