Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9175670 | Precast concrete post tensioned segmented wind turbine tower | James D. Lockwood | 2015-11-03 |
| D579575 | Composite plastics bridge unit | — | 2008-10-28 |
| D573722 | Precast concrete support for a bridge | — | 2008-07-22 |
| 7001110 | Precast concrete retaining wall | — | 2006-02-21 |
| 6854928 | Precast concrete culvert system | — | 2005-02-15 |
| D490533 | Concrete tunnel for a rapid transit train | — | 2004-05-25 |
| D484610 | Concrete tunnel for a rapid transit train | — | 2003-12-30 |
| 6416693 | Method of strengthening an existing reinforced concrete member | — | 2002-07-09 |
| 6094881 | Box shaped structural member with pultruded flanges and connecting webs | — | 2000-08-01 |
| D426321 | Composite bridge deck pultrusion | — | 2000-06-06 |
| 5894003 | Method of strengthening an existing reinforced concrete member | — | 1999-04-13 |
| D406902 | Concrete bridge section | — | 1999-03-16 |
| 4993872 | Precast concrete culvert system | — | 1991-02-19 |
| 4854775 | Precast concrete culvert system | — | 1989-08-08 |
| 4797030 | Precast concrete culvert system | — | 1989-01-10 |
| 4687371 | Precast concrete culvert section | — | 1987-08-18 |
| 4595314 | Precast concrete culvert section | — | 1986-06-17 |