Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4934716 | Pipe sealing ring and method of manufacturing the same | Olof Nordin, Sohen Forsberg | 1990-06-19 |
| 4379559 | Pipe sealing device | — | 1983-04-12 |
| 4372905 | Method of forming a pipe socket | — | 1983-02-08 |
| 4371179 | T-Shaped sealing ring with elongated lip | — | 1983-02-01 |