Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8844174 | Dipper door latch with locking mechanism | William J. Hren, Joseph J. Colwell, Jeffrey S. Schwake | 2014-09-30 |
| 8590180 | Dipper door latch with locking mechanism | William J. Hren, Joseph J. Colwell, Jeffrey S. Schwake | 2013-11-26 |
| 8136272 | Dipper door latch with locking mechanism | William J. Hren, Joseph J. Colwell, Jeffrey S. Schwake | 2012-03-20 |