Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877449 | Vertical shaft melting furnace and method of melting | — | 1989-10-31 |
| 4854249 | Two stage combustion | Jitendra G. Patel, William A. Sandstrom | 1989-08-08 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877449 | Vertical shaft melting furnace and method of melting | — | 1989-10-31 |
| 4854249 | Two stage combustion | Jitendra G. Patel, William A. Sandstrom | 1989-08-08 |