Martin E. Cobern
14Patents
12h-index
11Co-inventors
75Inventor score
Filing activity: Sep 30, 1983 → Nov 7, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4716973A | Method for evaluation of formation invasion and formation permeability | Physics | 220 | Expired |
| US4813274A | Method for measurement of azimuth of a borehole while drilling | Fixed Constructions | 44 | Expired |
| US5242020A | Method for deploying extendable arm for formation evaluation MWD tool | Fixed Constructions | 44 | Expired |
| US5034929A | Means for varying MWD tool operating modes from the surface | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US7762356B2 | Rotary steerable motor system for underground drilling | Fixed Constructions | 38 | Active |
| US4894923A | Method and apparatus for measurement of azimuth of a borehole while drilling | Fixed Constructions | 38 | Expired |
| US4761889A | Method for the detection and correction of magnetic interference in the surveying of boreholes | Fixed Constructions | 37 | Expired |
| US4647853A | Mud turbine tachometer | Fixed Constructions | 37 | Expired |
| US7389830B2 | Rotary steerable motor system for underground drilling | Fixed Constructions | 34 | Expired |
| US7681663B2 | Methods and systems for determining angular orientation of a drill string | Fixed Constructions | 27 | Active |
| US8397562B2 | Apparatus for measuring bending on a drill bit operating in a well | Fixed Constructions | 22 | Active |
| US9458679B2 | Apparatus and method for damping vibration in a drill string | Fixed Constructions | 13 | Active |
| US10113363B2 | System and related methods for control of a directional drilling operation | Physics | 4 | Active |
| US9279903B2 | Apparatus for measuring bending on a drill bit operating in a well | Fixed Constructions | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.