Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819691 | Valve device | Nils I. Aarthun | 1989-04-11 |
| 4817687 | Filling device | Nils Arthun | 1989-04-04 |
| 4800023 | Method of aseptic treatment of water and a storage container to be used at such treatment | Nils Arthun | 1989-01-24 |