Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4978062 | Thermostatic expansion valve with bi-directional flow | — | 1990-12-18 |
| 4320000 | Bidirectional flow filter-drier | Eugene Ziegler | 1982-03-16 |
| 4227901 | Filter-drier for heat pump systems | — | 1980-10-14 |