Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5090451 | Combination steam and fuel oil supply and purge valve with recirculation feature | Joseph R. Buchanan | 1992-02-25 |
| 5048563 | Steam and fuel oil supply and purge valve with cooling steam feature | Joseph R. Buchanan | 1991-09-17 |