Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10288300 | System and method of controlling condensing and non-condensing boiler firing rates | William Kovalcik, Boris M. Tynkov, John Sutphen | 2019-05-14 |
| 9477242 | System and method of controlling condensing and non-condensing boiler firing rates | William Kovalcik, Boris M. Tynkov, John Sutphen | 2016-10-25 |
| 6470835 | Plate-type heat exchanger for exhaust gas heat recovery | Tod A. Stansfield, Wilfred L. Ayala, Stephen R. Wilkinson, Todd Anderson, Hyunjae Park | 2002-10-29 |
| 6357396 | Plate type heat exchanger for exhaust gas heat recovery | Tod A. Stansfield, Wilfred L. Ayala, Stephen R. Wilkinson, Todd Anderson, Hyunjae Park | 2002-03-19 |