| # | Name | Location | Applications |
|---|---|---|---|
| 1. | OXYDATOR IVS | 🇩🇰 Aarhus C, Denmark | 1 |
| 2. | OXYGEN BIOTHERAPEUTICS, INC. | 🇺🇸 Costa Mesa, CA, United States | 1 |
| 3. | Oxygen Finance Limited | 🇺🇸 , United States | 1 |
| 4. | Oxygenator Water Technologies, Inc. | 🇺🇸 St. Louis Park, MN, United States | 1 |
| 5. | Oxyzoglou Ioannis | 🇬🇧 London, United Kingdom | 1 |