| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Spain | 7 | |
| #2 | Austria | 2 | |
| #3 | United States | 2 | |
| #4 | Denmark | 1 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Furnaces | |
| #2 | Manufacturing processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spirlet Xavier De | 6 |
| Publication | Filing date | Title |
|---|---|---|
| US1077010A | Mechanical system for roasting sulfurous ores by a continuous process. | |
| GB191301849A | Improvements in or relating to Furnaces for Roasting Ores. | |
| US979349A | Furnace for roasting ores. |