Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8403716 | Twin-skeg ship | — | 2013-03-26 |
| 8028636 | Stern shape of displacement-type marine vessel | Reiko Takashima, Makoto Nishigaki, Naoki Ueda, Kenichi Yamamoto | 2011-10-04 |
| 7013820 | Ship and operating method therefor | Satoru Ishikawa | 2006-03-21 |
| 6682377 | Propulsion apparatus for a vessel | Satoru Ishikawa, Tetsuji Hoshino | 2004-01-27 |
| 4764176 | Method for preventing the brightening effect of optical brightening agents on textiles | — | 1988-08-16 |