| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 3 | |
| #2 | Canada | 2 | |
| #3 | New Zealand | 2 | |
| #4 | United States | 2 | |
| #5 | Brazil | 1 | |
| #6 | China | 1 | |
| #7 | EPO (European Patent Office) | 1 | |
| #8 | Hungary | 1 | |
| #9 | Ireland | 1 | |
| #10 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Rotary pistons | |
| #3 | Frames | |
| #4 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grayden Paul A | 6 |
| #2 | Grayden Paul Andrew | 5 |
| #3 | Grayden P A | 2 |
| Publication | Filing date | Title |
|---|---|---|
| AU8242987A | Temperature control and heat exchanger | |
| AU8242887A | Mount assembly | |
| CN1006179B | Pump | |
| NZ221266A | Bearing arrangement for water ring vacuum pump: stub shafts on ends of impeller shaft | |
| AU4248185A | Improved pump | |
| EP0168138A1 | Water ring vacuum pump |