Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9638456 | Mounting system for a generator assembly | David J. Renken, Tom J. Niemi | 2017-05-02 |
| 8252230 | System and method for sanitization | Thomas E. Birchard, Matthew S. Nelson | 2012-08-28 |
| 7743616 | Control system for a generator | David J. Renken, Randy S. Burnham, Erich Albert Lucht | 2010-06-29 |