Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5727598 | Pipe wall segment and pipe having sidewall | — | 1998-03-17 |
| 5123776 | Plastic fillable manhole cover with penetrating handles | Timothy Lang, Eli Blumenau | 1992-06-23 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5727598 | Pipe wall segment and pipe having sidewall | — | 1998-03-17 |
| 5123776 | Plastic fillable manhole cover with penetrating handles | Timothy Lang, Eli Blumenau | 1992-06-23 |