Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4235354 | Sealing structure for rotary valves | Tatuo Aonuma, Michio Kiuchi, Takeshi Akao | 1980-11-25 |
| 4228932 | Sealing structure for rotary valves | Tatuo Aonuma, Michio Kiuchi, Takeshi Akao | 1980-10-21 |