Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9243380 | Reinforced arch with floating footer and method of constructing same | — | 2016-01-26 |
| 8215869 | Reinforced soil arch | — | 2012-07-10 |
| 7559720 | Culvert bundle for stream crossings and flow-through bridge abutments | Ronald J. Neden | 2009-07-14 |
| 7080956 | Open bottom box culvert | Ronald J. Neden | 2006-07-25 |
| 6874974 | Reinforced soil arch | Ronald J. Neden | 2005-04-05 |