Top Inventors at Oldcastle Architectural All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Leonard Browning | 10 |
| 2 | Robert John Lundell | 8 |
| 3 | Stephane Beliveau | 4 |
| #4 | Brian Austin | 3 |
| #5 | David Skierkowski | 3 |
| #6 | Gregory Allen Jacot | 3 |
| #7 | Jason Rhees | 3 |
| #8 | John A. Fifield | 3 |
| #9 | Michael McVey | 3 |
| #10 | William Charles Leonhardt | 3 |
| #11 | David Rice | 1 |
| #12 | John Alan Kemp | 1 |
| #13 | Ronald J. Scherer | 1 |
| #14 | Steven E. Hinde | 1 |