Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4587543 | Method and device for detecting metal ions | Iwao Ohshima | 1986-05-06 |
| 4297873 | Plugging device | Hiromichi Nei, Iwao Ohshima, Yuji Horikawa | 1981-11-03 |
| 4274280 | Plugging indicator | Hiromichi Nei, Iwao Ohshima, Yuji Horikawa | 1981-06-23 |