Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12331478 | Modular driving head mandrel systems and methods for sheet piling installation | Steve HARGRAVE, Mike Smith | 2025-06-17 |
| 11891770 | Catenary panel retaining wall | Steve HARGRAVE | 2024-02-06 |
| 8449707 | Method of manufacturing a structural polymer core assembly | Richard A. Simmons, John R. Stoll, F. Arthur Simmons | 2013-05-28 |
| 7857934 | Method of manufacture of a structural polymer core assembly | Richard A. Simmons, John R. Stoll, F. Arthur Simmons | 2010-12-28 |
| 7297390 | Structural polymer core assembly, method of manufacture and method of use | Richard A. Simmons, John R. Stoll, F. Arthur Simmons | 2007-11-20 |