| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 3 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | United States | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | Brazil | 1 | |
| #6 | New Zealand | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology | |
| #3 | Machines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Internal-combustion piston engines | |
| #2 | Machines | |
| #3 | Climate change mitigation in transportation | |
| #4 | Pumps | |
| #5 | Special machines | |
| #6 | Rotary pistons | |
| #7 | Unspecified technologies | |
| #8 | Positive-displacement engines | |
| #9 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Duke Noel Stephen | 11 |
| #2 | Lynn Robert Gulliver | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU1943400A | Axial piston machine | |
| WO9859160A1 | Axial piston rotary machine | |
| NZ270736A | Wobble plate engine with pairs of rotating cylinders around output shaft, with port plates in end covers |