Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823358 | High capacity electron beam cold hearth furnace | Howard R. Harker | 1989-04-18 |
| 4808376 | Method of alloying aluminum and calcium into lead | Anthony W. Worcester, Kai Ravnborg | 1989-02-28 |