Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848044 | Expansion joint cover | Allan R. LaRoche, Robert Butcher, Douglas S. Pearmain | 1989-07-18 |
| 4663894 | Flexible gutter | Allan R. LaRoche, Robert Butcher, Denis M. Kelleher, Marcel L. M. Corriveau | 1987-05-12 |