Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8002497 | Coupler for leaching chamber systems | Kristen K. Hedstrom, William V. Shaffer | 2011-08-23 |
| 7413382 | Coupler for leaching chamber systems | Kristen K. Hedstrom, William V. Shaffer | 2008-08-19 |
| 7160059 | Adjustable angle coupler for leaching chamber systems | Kristen K. Hedstrom, William V. Shaffer | 2007-01-09 |
| 6592293 | Adjustable angle coupler for leaching chamber systems | Kristen K. Hedstrom, William V. Shaffer | 2003-07-15 |
| 6270287 | Leaching chamber | — | 2001-08-07 |
| 6076993 | Leaching chamber | — | 2000-06-20 |
| D403047 | Post and dome interconnect for leaching chambers | — | 1998-12-22 |
| D397090 | Coupling flange for conduits | — | 1998-08-18 |
| 5498104 | Leaching chamber | — | 1996-03-12 |
| 5441363 | Leaching chamber | — | 1995-08-15 |
| D329684 | Leaching chamber | — | 1992-09-22 |