Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5093712 | Resin-sealed semiconductor device | Yoshihiro Matsunaga, Hiromasa Matsuoka, Kozo Shimamoto, Kiyoaki Tsumura | 1992-03-03 |
| 4917806 | Method of and apparatus for controlling pH and electrical conductivity of water using ion exchange resin | Yoshihiro Matsunaga, Hiromasa Matsuoka | 1990-04-17 |