John A. Johansen
15Patents
10h-index
22Co-inventors
72Inventor score
Filing activity: Oct 24, 1996 → Aug 17, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6595487B2 | Electric actuator | Fixed Constructions | 64 | Expired |
| US6998724B2 | Power generation system | Mechanical Engineering; Lighting; Heating | 60 | Expired |
| US7137450B2 | Electric-hydraulic power unit | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US7159662B2 | System for controlling a hydraulic actuator, and methods of using same | Fixed Constructions | 30 | Expired |
| US5771927A | Undersea hydraulic connector with equalization channel | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6397948B1 | Shearing arrangement for subsea umbilicals | Emerging Cross-Sectional Technologies | 26 | Expired |
| US8875794B2 | Trigger joint | Fixed Constructions | 21 | Active |
| US7287595B2 | Electric-hydraulic power unit | Mechanical Engineering; Lighting; Heating | 17 | Active |
| US6719057B2 | Downhole subsurface safety valve device | Fixed Constructions | 15 | Expired |
| US8322427B2 | Control system | Fixed Constructions | 12 | Active |
| US7273105B2 | Monitoring of a reservoir | Fixed Constructions | 10 | Expired |
| US7398830B2 | Electric-hydraulic power unit | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US8806092B2 | Control system for a subsea installation | Physics | 0 | Expired |
| US11875918B2 | Electrical feedthrough system and methods of use thereof | Electricity | 0 | Active |
| US11920427B2 | Method of operating a subsea production system, a subsea tree and an electric downhole safety valve | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.