Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8403596 | Groundwater control system and method | Charlie J. Schafer, Britt Dinsdale, Phil Algreen | 2013-03-26 |
| 6715508 | Drainage tile flow regulator | Charlie J. Schafer, Leo E. Beebout | 2004-04-06 |
| 6672626 | Corrugated pipe connection stabilizing apparatus | Charlie J. Schafer, Mark P. Gettler | 2004-01-06 |