| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 2 | |
| #2 | Belgium | 2 | |
| #3 | Germany | 2 | |
| #4 | France | 2 | |
| #5 | Italy | 2 | |
| #6 | United States | 2 | |
| #7 | South Africa | 2 | |
| #8 | Austria | 1 | |
| #9 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Fluid fuel combustion | |
| #2 | Steam generation | |
| #3 | Rotary pistons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grecken Gene Van | 3 |
| #2 | Van Grecken G | 3 |
| #3 | Grecken G Van | 2 |
| #4 | Grecken Grene Van | 1 |
| #5 | Van Grecken Gene | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU4017472A | Combustion and/or heating apparatus | |
| AU3987472A | Energy conversion device |