Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6616412 | Tapered polygon coupling | Ronald L. Haugen, Jeff Schmidt | 2003-09-09 |
| 6461111 | Tapered polygon coupling | Ronald L. Haugen, Jeff Schmidt | 2002-10-08 |
| 5578201 | Apparatus for mixing liquids used in countercurrent multiphase liquid separation | Charles F. Collier, Brian A. Deane, William E. Feathers, Alexander D. Kopatsis, Thomas P. Ladisch +2 more | 1996-11-26 |
| 5174004 | Radiator clamping jig | Kenneth J. M. Wood | 1992-12-29 |