Colin Walker
33Patents
17h-index
45Co-inventors
81Inventor score
Filing activity: Jan 20, 1975 → May 23, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6113637A | Artificial intervertebral joint permitting translational and rotational motion | Human Necessities | 777 | Expired |
| US6540785B1 | Artificial intervertebral joint permitting translational and rotational motion | Human Necessities | 426 | Expired |
| US6244361A | Steerable rotary drilling device and directional drilling method | Mechanical Engineering; Lighting; Heating | 171 | Expired |
| US6581699B1 | Steerable drilling system and method | Fixed Constructions | 112 | Expired |
| US7225879B2 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell | Fixed Constructions | 91 | Expired |
| US5311953A | Drill bit steering | Fixed Constructions | 76 | Expired |
| US6328119A | Adjustable gauge downhole drilling assembly | Fixed Constructions | 59 | Expired |
| US7571777B2 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell | Fixed Constructions | 47 | Active |
| US8011446B2 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell | Fixed Constructions | 37 | Active |
| US5535835A | Straight/directional drilling device | Fixed Constructions | 37 | Expired |
| US7147066B2 | Steerable drilling system and method | Fixed Constructions | 35 | Expired |
| US6948572B2 | Command method for a steerable rotary drilling device | Fixed Constructions | 32 | Expired |
| US7510031B2 | Directional drilling control | Fixed Constructions | 28 | Active |
| US9945190B2 | Articulating component of a downhole assembly, downhole steering assembly, and method of operating a downhole tool | Fixed Constructions | 21 | Active |
| US4322162A | Method and apparatus for sensing in-plane deformation of a surface | Physics | 21 | Expired |
| US5090496A | Down-hole bent motor housings | Fixed Constructions | 19 | Expired |
| US6340063B1 | Steerable rotary directional drilling method | Fixed Constructions | 17 | Expired |
| US8206399B2 | Artificial intervertebral joint permitting translational and rotational motion | Human Necessities | 14 | Active |
| US7543658B2 | Directional drilling control | Fixed Constructions | 11 | Active |
| US8562682B2 | Artificial intervertebral joint permitting translational and rotational motion | Human Necessities | 10 | Active |
| US4474466A | Measurement of deformation | Physics | 10 | Expired |
| US7621343B2 | Steerable drilling system and method | Fixed Constructions | 8 | Active |
| US9347279B2 | Torque control device for a downhole drilling assembly | Fixed Constructions | 8 | Active |
| US8176999B2 | Steerable drill bit arrangement | Fixed Constructions | 6 | Expired |
| US8286732B2 | Steering component, steering assembly and method of steering a drill bit in a borehole | Fixed Constructions | 4 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.