Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4780217 | Method for introducing oxygen into water and an apparatus for implementing the said method | — | 1988-10-25 |
| 4535714 | Rudder rotor for watercraft and floating equipment | — | 1985-08-20 |
| 4316721 | Method for producing a thrust in manoeuvering engines for a watercraft and a manoeuvering engine constructed for the same | Friedrich Weiss | 1982-02-23 |