Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848100 | Controlling refrigeration | Richard C. Barthel, Charles D. Orth, George W. Jarosch | 1989-07-18 |
| 4794762 | Refrigerant flow control system | Charles D. Orth, Richard C. Barthel | 1989-01-03 |