| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 4 | |
| #2 | Italy | 3 | |
| #3 | Belgium | 1 | |
| #4 | Germany | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Japan | 1 | |
| #8 | Netherlands | 1 | |
| #9 | Sweden | 1 | |
| #10 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #11 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Parietti Pietro | 7 |
| #2 | Parietti Petro | 1 |
| #3 | Pietoro Parietsutei | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2848174A1 | PRESSURE REGULATOR FOR FUEL, ESPECIALLY IN COMBUSTION ENGINES |