Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9187229 | Oil-less pressure relief valves | Karl K. Hoffman, Robert C. Larsen, Keith P. Hoffman | 2015-11-17 |
| 8783292 | Oil-less pressure relief valves | Karl K. Hoffman, Keith P. Hoffman, Robert C. Larsen | 2014-07-22 |
| 8636034 | Oil-less and wetted pressure relief valves having an integrated filter | Karl K. Hoffman, Keith P. Hoffman, Robert C. Larsen, John Ozcomert | 2014-01-28 |