Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9322550 | Water seal at backpass economizer gas outlet | — | 2016-04-26 |
| 5435257 | Apparatus for introducing gas recirculation into a furnace | — | 1995-07-25 |
| 4510892 | Seal for boiler water wall | Earl K. Rickard | 1985-04-16 |
| 4474143 | Retractable maintenance platform stored outside of the furnace | — | 1984-10-02 |
| 4383573 | Rotary regenerative air heater | — | 1983-05-17 |