Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5927408 | Head brake release with memory and method of controlling a drill head | Gregory Dantzman | 1999-07-27 |
| 4382360 | Unloading arrangement for hydraulic swing circuit or the like | — | 1983-05-10 |
| 4304337 | Marine crane lifting control | — | 1981-12-08 |