Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8348281 | Seal ring and stern tube sealing device | Hisashi Yoshida, Minoru Takayasu | 2013-01-08 |
| D638522 | Seal ring for stern tube | Hisashi Yoshida, Minoru Takayasu | 2011-05-24 |
| D638523 | Seal ring for stern tube | Hisashi Yoshida, Minoru Takayasu | 2011-05-24 |
| D631948 | Seal ring for stern tube | Hisashi Yoshida, Minoru Takayasu | 2011-02-01 |