Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5358793 | PTC device | Toshiyuki Hanada, Naoki Yamazaki, Isao Morooka, Kazuhiko Harazaki | 1994-10-25 |
| 5171774 | PTC compositions | Akira Ueno, Naoki Yamazaki, Syoiti Sugaya | 1992-12-15 |