Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5094467 | Pipe gasket with limited penetration locking elements | — | 1992-03-10 |
| 4848805 | Packing for telescopically locked pipe joints | Claude Bucher | 1989-07-18 |
| 4645243 | Insulated iron pipe joint | Claude Bucher | 1987-02-24 |
| 4546987 | Packing seal for cast iron pipe joints | Claude Bucher | 1985-10-15 |
| 4301200 | Plastic tube formed by spiral winding of a snap locking profile strip | Michel Langenfeld | 1981-11-17 |