Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5901506 | Composite concrete and plastic manhole system | Ronald E. Bailey | 1999-05-11 |
| 4856561 | Seal construction for bell and spigot pipe | — | 1989-08-15 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5901506 | Composite concrete and plastic manhole system | Ronald E. Bailey | 1999-05-11 |
| 4856561 | Seal construction for bell and spigot pipe | — | 1989-08-15 |