Showing 1–15 of 15 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | William C. Motion | Camco Drilling Group Limited Of Hycalog | 5 |
| 2 | Robin Millard | Tilghman Wheelabrator Limited | 4 |
| 3 | Ian B. Pilkington | Ciba-Geigy | 2 |
| 3 | Reginald Leah | — | 2 |
| 3 | David Dennis Salt | IBM | 2 |
| 3 | Alex Szymborski | — | 2 |
| 3 | Stuart D. Jones | Amgen | 2 |
| 3 | David R. Ascroft | Smiths Industries Plc | 2 |
| #9 | Henry N. Shirman | J. C. Bamford Excavators Limited | 1 |
| #9 | John M. Bather | — | 1 |
| #9 | Aad Van Adrichem | Reeves Brothers | 1 |
| #9 | David Ian Colguhoun | Smiths Industries Plc | 1 |
| #9 | Keith Curran | — | 1 |
| #9 | Jennifer Susan Leah | — | 1 |
| #9 | Thomas K. Bunnell | — | 1 |