Top Inventors at Blue Circle Industries All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | David E. Smith | 2 |
| 2 | Gerald C. Bye | 2 |
| 3 | John Carpenter | 1 |
| #4 | Kenneth Brooks | 1 |
| #5 | Kenneth B. Matthews | 1 |
| #6 | Lawrence Paul Evans | 1 |
| #7 | Leslie E. Shiel | 1 |
| #8 | Richard R. Davidson | 1 |
| #9 | Thomas Lowes | 1 |
| #10 | David J. Tookey | 1 |
| #11 | Alban Timmons | 1 |
| #12 | Anthony Robin Pennell | 1 |