Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5549131 | Automatic recirculation valve | Ronald J. Sirchio, James J. Henofer | 1996-08-27 |
| 5333638 | Automatic recirculation valve | — | 1994-08-02 |
| 4941502 | Low pressure recirculation valve | George J. Loos | 1990-07-17 |