Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5922273 | Modular hearth arrangement for cold hearth refining | Dana King, Richard ROTH, Alan BLACKBURN | 1999-07-13 |
| 4616363 | Electron-beam furnace with magnetic stabilization | Howard R. Harker | 1986-10-07 |