Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4740990 | Graphite electrode with protective coating and method for its production | Rumen B. Radev, Vasil G. Peev | 1988-04-26 |
| 4703493 | Seal for an electrode hole in an electric arc furnace | Nikolay G. Bakalov, Penyo I. Penev, Ivan K. Ivanov, Velyo T. Velev, Peter H. Savov | 1987-10-27 |