Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844426 | Vertical shaft furnace for melting aluminum | David A. Barnes, John D. Butler, Robert H. McKenzie | 1989-07-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844426 | Vertical shaft furnace for melting aluminum | David A. Barnes, John D. Butler, Robert H. McKenzie | 1989-07-04 |