| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 4 | |
| #2 | Austria | 3 | |
| #3 | Belgium | 3 | |
| #4 | Canada | 3 | |
| #5 | Germany | 3 | |
| #6 | France | 3 | |
| #7 | United States | 3 | |
| #8 | Switzerland | 2 | |
| #9 | Spain | 2 | |
| #10 | Greece | 2 | |
| #11 | Italy | 2 | |
| #12 | Yugoslavia (Serbia and Montenegro) | 2 | |
| #13 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Fluid heaters | |
| #2 | Heat-exchange device details | |
| #3 | Heat-exchanger without contact | |
| #4 | Burners |
| # | Name | Total Patents |
|---|---|---|
| #1 | Trestin Alessandro | 4 |
| #2 | Ferroli Tredicesimo Luciano | 3 |
| #3 | Tredicesimo Luciano Ferroli | 2 |
| #4 | Ferroli Tredicesimo L | 2 |
| #5 | Ferroli T L | 2 |
| #6 | Luciano Ferroli Tredicesimo | 2 |
| #7 | Ferroli L | 1 |
| #8 | Trestin A | 1 |
| #9 | Simo Luciano Ferroli Tredice | 1 |
| Publication | Filing date | Title |
|---|---|---|
| BE893950A | Boiler element provided with thermal exchange fins which have an aerodynamic cross section | |
| BE889473A | Radiator element with front longitudinal fin | |
| GB1566182A | Boiler for liquid or gaseous fuels | |
| US3589343A | Boiler having tapered duct elements | |
| US3563473A | Gas burner unit | |
| CA879497A | Gas burner unit | |
| CA890192A | Boiler having tapered duct elements |