| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Italy | 10 | |
| #2 | Canada | 3 | |
| #3 | Australia | 2 | |
| #4 | Germany | 2 | |
| #5 | France | 2 | |
| #6 | United States | 2 | |
| #7 | WIPO (World Intellectual Property Organization) | 2 | |
| #8 | Austria | 1 | |
| #9 | Belgium | 1 | |
| #10 | Switzerland | 1 | |
| #11 | EPO (European Patent Office) | 1 | |
| #12 | Spain | 1 | |
| #13 | Japan | 1 | |
| #14 | Netherlands | 1 | |
| #15 | Yugoslavia (Serbia and Montenegro) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Engines, pumps and turbines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ravagnan Giancarlo | 20 |
| #2 | Jiankaruro Rabagunan | 1 |
| #3 | Giancarlo Ravagnan | 1 |
| #4 | Ravagnan G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU2003278477A1 | Internal-combustion engine with separate and optimized compression, combustion and expansion stroke | |
| CA2172489A1 | Apparatus for recovering fluid substances floating on a water surface | |
| US4368122A | System for separating and collecting oily materials from water expanses | |
| US4221669A | System for separating and removing oil based matter from liquids such as water |