Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889540 | Apparatus for determination of slag tap blockage | Clifford C. Segerstrom, Jacob H. Stil, Gunter K. Eckstein | 1989-12-26 |
| 4834778 | Determination of slag tap blockage | Clifford C. Segerstrom, Jacob H. Stil, Gunter K. Eckstein | 1989-05-30 |