Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8585364 | Vertical axis wind turbine | — | 2013-11-19 |
| 6904976 | Powered soil tillage device | Lawrence J. Zach | 2005-06-14 |
| 6065321 | Outlet for connecting spray nozzles and drop tubes to an irrigation pipe | Joel J. Ludwig | 2000-05-23 |
| 5938127 | Outlet for connecting spray nozzles, drop tubes or the like to an irrigation pipe | Joel J. Ludwig | 1999-08-17 |
| 5601032 | Apparatus for opening and closing railroad hopper car discharge doors | — | 1997-02-11 |