Robert T. Evans
11Patents
10h-index
9Co-inventors
61Inventor score
Filing activity: Dec 30, 1974 → Aug 29, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4590995A | Retrievable straddle packer | Fixed Constructions | 170 | Expired |
| US4113012A | Reclosable circulation valve for use in oil well testing | Fixed Constructions | 82 | Expired |
| US4646829A | Hydraulically set and released bridge plug | Fixed Constructions | 43 | Expired |
| US3976136A | Pressure operated isolation valve for use in a well testing apparatus and its method of operation | Fixed Constructions | 39 | Expired |
| US4312564A | Multi-fiber optic connector | Physics | 29 | Expired |
| US4924495A | Enhanced communication services and apparatus | Emerging Cross-Sectional Technologies | 25 | Expired |
| US3958851A | Shielded connector | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4278130A | Access valve for drill stem testing | Fixed Constructions | 22 | Expired |
| US4405201A | Fiber optic connector | Physics | 18 | Expired |
| US5170008A | External cable grommet for cable entry of EMI protected cabinets | Electricity | 17 | Expired |
| US4696344A | Annulus pressure operated ratchet device | Fixed Constructions | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.