Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5682761 | Ultra-high purity nitrogen generating method and unit | Takashi Nagamura, Shinji Tomita | 1997-11-04 |
| 5638699 | High purity nitrogen gas generator | Shingo Koizumi | 1997-06-17 |
| 5602358 | Effect imparting device and electronic musical instrument incorporating same | Yoichiro Ogai, Kiyoshi Hasebe | 1997-02-11 |