Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8500383 | Trailer and unloading device | — | 2013-08-06 |
| 5587185 | Automated system for handling and cleaning concrete pipe-making components | Jon A. Schmidgall | 1996-12-24 |
| 4708621 | Concrete pipe making machine | Jon A. Schmidgall | 1987-11-24 |
| 4657498 | Apparatus for lining pipe | Jon A. Schmidgall | 1987-04-14 |
| 4578235 | Method for lining pipe | Jon A. Schmidgall | 1986-03-25 |
| 4301638 | Spacer for reinforced concrete structures | — | 1981-11-24 |