Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7441563 | Thermostatic expansion valve with check valve | Li Huiqing, Ronald L. Campbell, Michael J. Noble | 2008-10-28 |
| 6698452 | Cycle reversing valve for use in heat pumps | Gregory E. Sisk, Thomas L. Hopkins, Glenn Edison Walters | 2004-03-02 |
| 6289931 | Cycle reversing valve for use in heat pumps | Gregory E. Sisk, Thomas L. Hopkins | 2001-09-18 |
| 5383338 | In-line sight indicator | Benjamin Bowsky | 1995-01-24 |
| 5364540 | Filter drier and method of filtering a fluid stream | — | 1994-11-15 |
| 4637881 | Filter drier | — | 1987-01-20 |