Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7531940 | Ion introducer employing piezoelectric bimorph element | Naotake Ozaki, Tohru Okamoto | 2009-05-12 |
| 5447034 | Cryogenic refrigerator and regenerative heat exchange material | Toru Kuriyama, Masahiko Takahashi, Hideki Nakagome, Yoichi Tokai | 1995-09-05 |
| 5332029 | Regenerator | Yoichi Tokai | 1994-07-26 |
| 5269854 | Regenerative material | Yoichi Tokai, Masashi Sahashi | 1993-12-14 |