Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5294422 | Process for purification of rare gas | Koichi Kitahara, Kenji Ohtsuka, Noboru Takemasa | 1994-03-15 |
| 5194233 | Process for purification of rare gas | Koichi Kitahara, Kenji Ohtsuka, Noboru Takemasa | 1993-03-16 |