Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8474325 | Apparatus and method for destructive load testing | Ronald D. Schmidgall, Darren C. Delzell | 2013-07-02 |
| 7832703 | Apparatus and method for protecting lined concrete pipe during the manufacturing process | Jon A. Schmidgall | 2010-11-16 |
| 7083406 | Vibration system for concrete pipe making machines | Jon A. Schmidgall | 2006-08-01 |
| 6817589 | Apparatus and method for removing joint rings from cured concrete products | Jon A. Schmidgall, Ronald D. Schmidgall | 2004-11-16 |