Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9187229 | Oil-less pressure relief valves | Karl K. Hoffman, Robert C. Larsen, Douglas A. Wielunski | 2015-11-17 |
| 8783292 | Oil-less pressure relief valves | Karl K. Hoffman, Robert C. Larsen, Douglas A. Wielunski | 2014-07-22 |
| 8636034 | Oil-less and wetted pressure relief valves having an integrated filter | Karl K. Hoffman, Robert C. Larsen, John Ozcomert, Douglas A. Wielunski | 2014-01-28 |
| 7674269 | Bone anchor implantation device | — | 2010-03-09 |
| 7131973 | Bone anchor implantation device | — | 2006-11-07 |
| 6221071 | Rapid electrode deployment | John Sherry | 2001-04-24 |