John T. Evans
16Patents
11h-index
29Co-inventors
72Inventor score
Filing activity: Sep 7, 1982 → Jul 16, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6472792B1 | Stator with teeth formed from a soft magnetic powder material | Electricity | 68 | Expired |
| US5606124A | Apparatus and method for determining the gravitational orientation of a well logging instrument | Fixed Constructions | 38 | Expired |
| US4514814A | Multi-processor axis control | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5301314A | Computer-aided customer support system with bubble-up | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5736637A | Downhole multiphase flow sensor | Physics | 31 | Expired |
| US4590458A | Offset removal in an analog to digital conversion system | Electricity | 29 | Expired |
| US5465443A | Swimming pool cleaner discs and assemblies | Fixed Constructions | 23 | Expired |
| US5964117A | Backward extrusion method and product | Performing Operations; Transporting | 18 | Expired |
| US5421054A | Swimming pool cleaner discs | Fixed Constructions | 18 | Expired |
| US8785771B2 | Zonal utility control system | Electricity | 15 | Active |
| US5594344A | Method and apparatus for generating and detecting amplitude and phase modulated sensor signals | Electricity | 12 | Expired |
| US5278359A | Simple multishot downhole explosive tool | Physics | 6 | Expired |
| US5421429A | Ladder with safety feet | Fixed Constructions | 5 | Expired |
| US9845654B2 | Subsea support | Fixed Constructions | 2 | Active |
| US9845650B2 | Running tool lock open device | Fixed Constructions | 2 | Active |
| US11339939B2 | Remotely operable light bar tilting system | Performing Operations; Transporting | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.