Ray Johns
3Patents
3h-index
2Co-inventors
30Inventor score
Filing activity: Sep 26, 1991 → Oct 8, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5259456A | Drill stem test tools | Fixed Constructions | 5 | Expired |
| US5222559A | Valves | Fixed Constructions | 5 | Expired |
| US5193619A | Well control apparatus | Fixed Constructions | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.