Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4980144 | Process for purifying nitrogen trifluoride gas | Nobuhiko Koto, Naruyuki Iwanaga, Isao Harada | 1990-12-25 |
| 4975259 | Method of liquefying and condensing nitrogen trifluoride and a method of purifying nitrogen trifluoride | Hiroyuki Hyakutake, Isao Harada, Naruyuki Iwanaga | 1990-12-04 |
| 4960581 | Method for preparing gaseous metallic fluoride | Isao Harada, Yukihiro Yoda, Naruyuki Iwanaga, Akio Kikkawa | 1990-10-02 |