Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6561747 | Ejector arrangement for a work machine | Peter F. Prillinger, David A. Young | 2003-05-13 |
| 6238167 | Over-center ejector blade lock | Peter F. Prillinger, David A. Young | 2001-05-29 |
| 4194790 | Rock cutting tip inserts | Stanley N. Johnson | 1980-03-25 |