Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11401810 | Removable and replaceable anchored tunnel gasket | Richard J. Bowers, Troy Davidson, James A. Westhoff, George M. Stamper | 2022-08-02 |
| 10954668 | Removable and replaceable anchored tunnel gasket | Richard J. Bowers, Troy Davidson, James A. Westhoff | 2021-03-23 |
| 10662643 | Removable and replaceable anchored frame-like tunnel gasket construction with soft corners | Richard J. Bowers | 2020-05-26 |
| 7922179 | Cast-in-place gasket for pipe joints | Johann Schlusselbauer | 2011-04-12 |
| 7401791 | Gasket with locking lugs | Michael Ferrara | 2008-07-22 |
| 7331582 | Gasket | William V. Shaffer | 2008-02-19 |
| 6948718 | Gasket | William V. Shaffer | 2005-09-27 |
| 6719302 | Symmetrical gasket for a pipe joint with increased surface contact | — | 2004-04-13 |
| 6406025 | Gasket and method for fabrication and use with corrugated pipe | James A. Westhoff, James A. Kelly | 2002-06-18 |
| 5687976 | Symmetrical gasket for a pipe joint | Salvatore R. Brugnano | 1997-11-18 |
| 4602792 | Dual function gasket with dual lips and optional locking ring | — | 1986-07-29 |
| 4602793 | Gasket with encapsulated locking ring | — | 1986-07-29 |
| 4555885 | Filler strip with locking clip | Ronald Raymond | 1985-12-03 |