Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5161578 | Warm-up/changeover valve or proximity switch | Richard C. Dreibelbis | 1992-11-10 |
| 4909308 | Changeover valve for a central air conditioning unit | Richard C. Dreibelbis | 1990-03-20 |
| 4844149 | Warm-up/changeover valve or proximity switch | Richard C. Dreibelbis | 1989-07-04 |