Top Inventors at Matthey Rustenburg Refiners (Pty) Limited All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Richard Alasdair Grant | 4 |
| 2 | Christopher Smith | 1 |
| 3 | Jeffrey Taylor | 1 |
| #4 | Joseph G. Day | 1 |
| #5 | John James MacGregor | 1 |
| #6 | John B. Payne, IV | 1 |
| #7 | Kenneth J. Shanton | 1 |
| #8 | Raymond Oliver | 1 |
| #9 | Yvonne Taylor | 1 |