Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6244059 | Eductor based oil return for refrigeration systems | — | 2001-06-12 |
| 6125648 | Multi-riser refrigeration system with oil return means | — | 2000-10-03 |
| 5875640 | Multi-story air conditioning system with oil return means | — | 1999-03-02 |
| 5437775 | Method for preparing high-purity propylene carbonate and for simultaneously making passivated electrodes | Wolfgang Dittrich, Elke Kinzel | 1995-08-01 |