Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Christopher N. F. Sayer | Orbital Engine Company (Australia) Pty Limited | 13 |
| 2 | John Ray Biffin | — | 3 |
| 3 | Chris N. Sayer | Orbital Walbro | 2 |
| 3 | Edward Bagnall | Joy Global Underground Mining | 2 |
| #5 | Richard R. Horsley | Royal Melbourne Institute Of Technology | 1 |
| #5 | Eddy Bagnall | Joy Global Underground Mining | 1 |