| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 4 | |
| #2 | Spain | 4 | |
| #3 | United States | 4 | |
| #4 | Brazil | 3 | |
| #5 | German Democratic Republic | 1 | |
| #6 | Germany | 1 | |
| #7 | France | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Greece | 1 | |
| #10 | Hungary | 1 | |
| #11 | Italy | 1 | |
| #12 | Poland | 1 | |
| #13 | Romania | 1 | |
| #14 | Sweden | 1 | |
| #15 | Yugoslavia (Serbia and Montenegro) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Materials and metallurgy | |
| #3 | Environmental technology | |
| #4 | Thermal processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Radev Rumen Borisov | 4 |
| #2 | Peev Vassil Georgiev | 4 |
| #3 | Peev Vasil Georgiev | 3 |
| #4 | Vulchev Alexander Yordanov | 3 |
| #5 | Tashev Kiril Hristov | 2 |
| #6 | Yordanov Vulchev Alexander | 2 |
| #7 | Vulchev Alexander Y | 2 |
| #8 | Taschev Kiril Hristov | 2 |
| #9 | Radev Rumen B | 2 |
| #10 | Peev Vassil G | 2 |
| Publication | Filing date | Title |
|---|---|---|
| ES2013192A6 | Graphite electrode with protective coating and method for its manufacture | |
| EP0231880A2 | Direct-current arc furnace for steelmaking | |
| ES2001878A6 | Sealing device for electrode opening in electric arc furnace | |
| EP0216471A2 | Sealing device for electrode openings in electric arc furnaces |