Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8678449 | Pipe joint and related method | William L. Zepp, James C. Schluter | 2014-03-25 |
| 8109540 | Pipe joint and related method | William L. Zepp, James C. Schluter | 2012-02-07 |
| 6994381 | Stab joint coupling | Thomas A. Nein | 2006-02-07 |
| 5862581 | Method for making a joint for a corrugated pipe segment | Lyle Eugene Miller | 1999-01-26 |
| 5842727 | Coupling for spiral corrugated pipe | — | 1998-12-01 |
| 5707088 | Joint for coupling plastic corrugated pipes | Lyle Eugene Miller | 1998-01-13 |
| 5383693 | Gaskets used in joining corrugated pipe | — | 1995-01-24 |
| 4702502 | Gasket for making joints in corrugated plastic pipe | Robert James William Higgs | 1987-10-27 |