Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5524819 | Expansion and check valve combination | Joseph H. Heffner, G. Thomas Seener | 1996-06-11 |
| 5364066 | Dual port valve with stepper motor actuator | David Charles Dorste, John W. Friend, Donald L. Tillotson | 1994-11-15 |
| 5232015 | Expansion valve with inlet strainer | Joseph H. Heffner | 1993-08-03 |
| 5038827 | Shuttle valve for a refrigeration system | Joseph H. Heffner | 1991-08-13 |
| 4964567 | Expansion and check valve combination | Joseph H. Heffner, G. Thomas Seener | 1990-10-23 |
| 4911404 | Electronically operated expansion valve | David Charles Dorste | 1990-03-27 |
| 4852364 | Expansion and check valve combination | G. Thomas Seener | 1989-08-01 |