Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877507 | Linings for aluminum reduction cells | Tom J. Hudson, John M. McIntyre, Pierre Tremblay, Claude Allaire | 1989-10-31 |
| 4873209 | Insulating lightweight refractory materials | — | 1989-10-10 |