| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Italy | 12 | |
| #2 | Germany | 1 | |
| #3 | EPO (European Patent Office) | 1 | |
| #4 | France | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pighetti Antonio | 8 |
| #2 | Guglielmi Mauro | 7 |
| #3 | Acerbi Sergio | 7 |
| #4 | Acerbi Leo | 4 |
| #5 | Vezzani Savino | 3 |
| #6 | Vezezani Savino | 1 |
| #7 | Mauro Guglielmi | 1 |
| #8 | Antonio Pighetti | 1 |
| #9 | Savino Vezzani | 1 |
| #10 | Sergio Acerbi | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0204666A1 | A two-way reversible-flow hydraulic control valve | |
| DE3244840A1 | Normally closed two-way needle valve with electromagnetic control | |
| US4592533A | Solenoid-operated two-way directional needle-valve, normally closed | |
| IT8240078D0 | Electromagnetic two-way needle valve |