Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854543 | Apparatus for forming an opening with a gasket in a masonry manhole | Emile Gonthier | 1989-08-08 |
| 4842785 | Method for installing gasket in a poured concrete structure | Emile Gonthier | 1989-06-27 |
| 4693482 | Molded elastomeric circular gasket | Emile Gonthier | 1987-09-15 |