Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5337470 | Method and apparatus for removing a nozzle insert from a steelmaking ladle | John P. Hoffman, Edward T. Witek, Donald J. Idstein | 1994-08-16 |
| 5321875 | Well block centering tool | John P. Hoffman, Donald J. Idstein | 1994-06-21 |