Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1052704 | Pipe | Seth Harding, Kris Sayre | 2024-11-26 |
| 8820800 | Multi-wall corrugated pipe couplings and methods | Gerald S. Sutton, James B. Goddard, John M. Kurdziel, David J. Kelley, Jeffrey J. Biesenberger | 2014-09-02 |
| 8820801 | Multi-wall corrugated pipe couplings and methods | Gerald S. Sutton, James B. Goddard, John M. Kurdziel, David J. Kelley, Jeffrey J. Biesenberger | 2014-09-02 |
| 8002497 | Coupler for leaching chamber systems | Kristen K. Hedstrom, Terrance H. Gray | 2011-08-23 |
| 7988438 | Extrusion die vacuum seals | Gerald S. Sutton, Randall A. Kolbet | 2011-08-02 |
| 7413382 | Coupler for leaching chamber systems | Kristen K. Hedstrom, Terrance H. Gray | 2008-08-19 |
| 7331582 | Gasket | William C. Andrick | 2008-02-19 |
| 7306264 | Pipe having a water-tight in-line bell | James B. Goddard | 2007-12-11 |
| 7160059 | Adjustable angle coupler for leaching chamber systems | Kristen K. Hedstrom, Terrance H. Gray | 2007-01-09 |
| 6948718 | Gasket | William C. Andrick | 2005-09-27 |
| 6592293 | Adjustable angle coupler for leaching chamber systems | Kristen K. Hedstrom, Terrance H. Gray | 2003-07-15 |