Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4428735 | Propeller mount for icebreaker | Joe Gruzling, Arno Keinonen, Colin Revill, Vlodek Laskow | 1984-01-31 |
| 4351255 | Ice-breaking ship | Arno Keinonen, Eero Makinen | 1982-09-28 |