Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811356 | Control circuit for switching power to an induction furnace | — | 1989-03-07 |
| 4807559 | Apparatus for alloying of coatings | Richard Sommer, Mario Tama, Clayton H. Allen | 1989-02-28 |