Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5095713 | Refrigerant handling system and method with multiple refrigerant capability | Gregg E. Laukhuf | 1992-03-17 |
| 5046322 | Electronic refrigerant transfer scale | Don A. Bulla, Byron J. Dunham | 1991-09-10 |
| RE33212 | Service station for refrigeration equipment | Ralph C. Lower, Kenneth W. Manz | 1990-05-08 |
| 4878356 | Storage tank scale for a refrigerant recovery system | Robert J. Punches, Roger D. Shirley | 1989-11-07 |
| 4879546 | Ultrasonic hand-held refrigerant leak detector | Byron J. Dunham, Don A. Bulla | 1989-11-07 |
| 4798055 | Refrigeration system analyzer | Ralph C. Lower, Byron J. Dunham, Don A. Bulla | 1989-01-17 |
| 4688388 | Service station for refrigeration equipment | Ralph C. Lower, Kenneth W. Manz | 1987-08-25 |
| 4631006 | Compact vacuum pump | — | 1986-12-23 |
| 4540353 | Two stage vacuum pump with shaft seal | — | 1985-09-10 |
| 4523897 | Two stage vacuum pump | Ralph C. Lower | 1985-06-18 |