John Pettit
5Patents
5h-index
4Co-inventors
48Inventor score
Filing activity: Sep 17, 1982 → Jul 21, 1989
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4674576A | Casing hanger running tool | Fixed Constructions | 34 | Expired |
| US4521040A | Combined metal and elastomer seal | Fixed Constructions | 22 | Expired |
| US4634152A | Casing hanger running tool | Fixed Constructions | 21 | Expired |
| US4900067A | Retrievable packoff with an embedded flexible, metallic band | Fixed Constructions | 12 | Expired |
| US4611663A | Casing hanger and running apparatus | Fixed Constructions | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.