Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866898 | Fire resistant expansion joint | Douglas S. Pearmain | 1989-09-19 |
| 4848044 | Expansion joint cover | Robert Butcher, Jean A. Dubuc, Douglas S. Pearmain | 1989-07-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866898 | Fire resistant expansion joint | Douglas S. Pearmain | 1989-09-19 |
| 4848044 | Expansion joint cover | Robert Butcher, Jean A. Dubuc, Douglas S. Pearmain | 1989-07-18 |