John E. Nelson
86Patents
19h-index
81Co-inventors
87Inventor score
Filing activity: Jun 16, 1976 → Jul 27, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6457529B2 | Apparatus and method for returning drilling fluid from a subsea wellbore | Fixed Constructions | 122 | Expired |
| US6302211A | Apparatus and method for remotely installing shoulder in subsea wellhead | Fixed Constructions | 62 | Expired |
| US6142375A | Apparatus and method for the optical detection of multiple items on a platform | Physics | 53 | Expired |
| US8536889B2 | Electrically conductive pins for microcircuit tester | Electricity | 42 | Active |
| US7975768B2 | Riser joint coupling | Emerging Cross-Sectional Technologies | 41 | Active |
| US6896076B2 | Rotating drilling head gripper | Fixed Constructions | 39 | Expired |
| US7337848B2 | Preloaded riser coupling system | Emerging Cross-Sectional Technologies | 32 | Active |
| US5303733A | Pressure regulating unit for beverage dispensing system | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5598869A | Pressure regulating unit | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4673929A | Circuit for processing digital image data in a high resolution raster display system | Physics | 27 | Expired |
| US7762319B2 | Metal annulus seal | Fixed Constructions | 24 | Active |
| US7861789B2 | Metal-to-metal seal for bridging hanger or tieback connection | Fixed Constructions | 24 | Active |
| US4132665A | Wire feed funnel | Electricity | 23 | Expired |
| US5299642A | Subsea wellhead tieback connector | Fixed Constructions | 21 | Expired |
| US4422882A | Pulsed liquid jet-type cleaning of highly heated surfaces | Performing Operations; Transporting | 21 | Expired |
| US6854981B2 | Small pin connecters | Electricity | 20 | Expired |
| US4700924A | Pressure energized rotary hydraulic seal | Fixed Constructions | 19 | Expired |
| US8205670B2 | Metal annulus seal | Fixed Constructions | 19 | Active |
| US4960172A | Casing hanger seal assembly with diverging taper | Fixed Constructions | 19 | Expired |
| US5440296A | Coil assembly for electronic article surveillance system | Electricity | 19 | Expired |
| US8146670B2 | Bi-directional annulus seal | Fixed Constructions | 18 | Active |
| US5170445A | Document decompressing system | Electricity | 17 | Expired |
| US4017973A | Magnetic tooth straightener | Human Necessities | 16 | Expired |
| US4471346A | Smoke detector | Physics | 16 | Expired |
| US6369709B1 | Terminal for libraries and the like | Physics | 15 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.