Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6481740 | Ball and socket trailer hitch assembly | Reinhold A. Haase, John D. Hull, James M. Gruidel, Todd J. Yost, Thomas G. Johnson | 2002-11-19 |
| 5739439 | Vertical stratified air/water sampling device | James M. Gruidel, John J. Lainson | 1998-04-14 |