Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11383899 | Tamper-resistant container | Tracy J. Twist, Dale Woiken | 2022-07-12 |
| 10676888 | Corrugated shell bearing piles and installation methods | William Charles Kruse, William E. Kruse | 2020-06-09 |
| 9746108 | Composite underground pipe structure | — | 2017-08-29 |
| 8991439 | Corrugated metal pipe | — | 2015-03-31 |
| 8985160 | Corrugated metal pipe | — | 2015-03-24 |
| 8839823 | Corrugated metal pipe | — | 2014-09-23 |
| 8573260 | Corrugated metal pipe | — | 2013-11-05 |
| 8555932 | Corrugated metal pipe | — | 2013-10-15 |