Issued Patents 2025
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12331856 | Sealing gasket with plastic retainer ring for plastic pipeline systems having pre-formed sockets | Mark A. Weih | 2025-06-17 |
| 12320089 | Reinforced manhole cover gasket | William Eugene Putnam, Randall Avery Putnam, David Alan Putnam, Mark A. Weih | 2025-06-03 |
| 12270495 | Segmented grip ring for plastic pipe joint restraint systems | Mark A. Weih | 2025-04-08 |