Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11846471 | Shell and tube heat exchanger with compound tubesheet | Luis Felipe Avila, Jefferi J. Covington, Tobias H. Sienel | 2023-12-19 |
| 8960179 | Air treatment module | Lei Yu, Lee G. Tetu | 2015-02-24 |
| 8206147 | Multistage gas furnace having split manifold | Ruddy C. Bussjager | 2012-06-26 |
| 6675795 | Freeze resistant method for draining furnace condensate in low temperature environments | Robert H. Swieczkowski | 2004-01-13 |
| 6145501 | Low emission combustion system | Shailesh Manohar, Chi Ming Ho | 2000-11-14 |
| 5878740 | Noise reducing device for combustion driven heating apparatus | Mark A. Daniels, Robert H. Swieczkowski | 1999-03-09 |