Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875643 | Starter arrangement for a helicopter | Staas Gietzen, Hans Weiner, Klaus Hain, Juergen Hawener | 1989-10-24 |
| 4830312 | Airplane, preferably a helicopter | Klaus Hain, Manfred Hochkonig | 1989-05-16 |
| 4798181 | Valve guidance for an exhaust gas valve of an internal combustion engine | Michael Beer, Erwin Knoll | 1989-01-17 |