Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4984811 | Pressure control system for stern tube seals | Tsuneo Kuwabara | 1991-01-15 |
| 4436313 | Device for sealing a propeller shaft against invasion of sea water | Hiroshi Tamama, Yukio Ozawa, Hiroshi Ito, Toyohiro Kinoshita | 1984-03-13 |