Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4372130 | Carbon dioxide snow generator with purging means | David J. Klee, David R. Ruprecht, John F. Boyle, John C. Mullane, Jr. | 1983-02-08 |
| 4370861 | Spiral-type heat exchanger | David R. Ruprecht | 1983-02-01 |
| 4324110 | Spiral-type heat exchanger | David R. Ruprecht | 1982-04-13 |