Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805881 | Internal gas generator for heat treating furnace | Thomas J. Schultz, Deane A. Horne, Stephen J. Sikirica | 1989-02-21 |
| 4802844 | High capacity, retractable furnace hearth | Timothy J. Kuhn, Arvind C. Thekdi | 1989-02-07 |