Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5898996 | Method of forming a cylindrical heat exchanger header tank | William J. Buchanan | 1999-05-04 |
| 5607012 | Heat exchanger | William J. Buchanan, Thomas A. Bowler | 1997-03-04 |
| 5111877 | Multi-tube heat exchanger with mechanically interlocked tubes formed from mechanically interlocked plates | William J. Buchanan | 1992-05-12 |