Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4977719 | Fire resistant expansion joint | Douglas S. Pearmain, Denis M. Kelleher | 1990-12-18 |
| 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 |
| 4663894 | Flexible gutter | Robert Butcher, Denis M. Kelleher, Marcel L. M. Corriveau, Jean A. Dubuc | 1987-05-12 |
| 4634622 | Lightweight asphalt based building materials and process for making same | Kenneth L. Jenkins, Stanley C. Suhaka, Rick Lee Dolin, Robert E. Hodgson, Neil R. Such +3 more | 1987-01-06 |