Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4902317 | Purifying apparatus for gaseous fluids | — | 1990-02-20 |
| 4877430 | Separator for gaseous fluids | — | 1989-10-31 |
| 4830644 | Separator for gaseous fluids | — | 1989-05-16 |
| 4401165 | Fire resistant sub-ceiling | Heinrich Oetjen | 1983-08-30 |
| 4256092 | Device for the conversion of solar radiation into heat | Heinrich W. Detjen | 1981-03-17 |