Michael B. Vinzant
10Patents
8h-index
16Co-inventors
69Inventor score
Filing activity: Dec 17, 1981 → Aug 17, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4452311A | Equalizing means for well tools | Emerging Cross-Sectional Technologies | 72 | Expired |
| US4448216A | Subsurface safety valve | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4723606A | Surface controlled subsurface safety valve | Fixed Constructions | 42 | Expired |
| US4834183A | Surface controlled subsurface safety valve | Fixed Constructions | 36 | Expired |
| US6302210A | Safety valve utilizing an isolation valve and method of using the same | Fixed Constructions | 30 | Expired |
| US7798229B2 | Dual flapper safety valve | Fixed Constructions | 17 | Active |
| US4469179A | Safety system | Fixed Constructions | 14 | Expired |
| US4461353A | Well safety valve | Emerging Cross-Sectional Technologies | 11 | Expired |
| USRE32343E | Well safety valve | General | 5 | Expired |
| US8047294B2 | Dual flapper safety valve | Fixed Constructions | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.