John Forrest
12Patents
8h-index
7Co-inventors
65Inventor score
Filing activity: Oct 1, 1986 → Aug 30, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5171138A | Composite stator construction for downhole drilling motors | Mechanical Engineering; Lighting; Heating | 86 | Expired |
| US4775017A | Drilling using downhole drilling tools | Fixed Constructions | 54 | Expired |
| US4807708A | Directional drilling of a drill string | Fixed Constructions | 52 | Expired |
| US5248896A | Power generation from a multi-lobed drilling motor | Mechanical Engineering; Lighting; Heating | 44 | Expired |
| US4901806A | Apparatus for controlled absorption of axial and torsional forces in a well string | Fixed Constructions | 36 | Expired |
| US5269383A | Navigable downhole drilling system | Fixed Constructions | 32 | Expired |
| US4926949A | Thermal shield for drilling motors | Fixed Constructions | 14 | Expired |
| US4796704A | Drop ball sub-assembly for a down-hole device | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4844179A | Drill string stabilizer | Fixed Constructions | 8 | Expired |
| US6118542A | Method and apparatus for determination of a quality property of a piece of meat | Physics | 4 | Expired |
| US11104837B2 | Drilling fluids and methods for making the same | Fixed Constructions | 0 | Active |
| US10421892B2 | Drilling fluids and methods for making the same | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.