Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811538 | Fire-resistant door | George F. Fowler | 1989-03-14 |
| 4810569 | Fibrous mat-faced gypsum board | Brian G. Randall | 1989-03-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811538 | Fire-resistant door | George F. Fowler | 1989-03-14 |
| 4810569 | Fibrous mat-faced gypsum board | Brian G. Randall | 1989-03-07 |