Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840514 | Manhole assembly with T-shaped hinge | Jean-Claude Hauer | 1989-06-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840514 | Manhole assembly with T-shaped hinge | Jean-Claude Hauer | 1989-06-20 |