David Coull
4Patents
4h-index
4Co-inventors
47Inventor score
Filing activity: Sep 15, 1989 → Nov 12, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8167051B2 | Selective agitation | Fixed Constructions | 24 | Active |
| US9004194B2 | Downhole tractor | Fixed Constructions | 12 | Active |
| US4964460A | Shut-in tool | Fixed Constructions | 11 | Expired |
| US9500031B2 | Rotary steerable drilling apparatus | Fixed Constructions | 5 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.