Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7214362 | Purification method for producing high purity niobium compound and/or tantalum compound | Hirohisa Kikuyama, Masahide Waki, Hiroto Izumi, Hirofumi Yazaki, Kenji Aoki +2 more | 2007-05-08 |
| 7175823 | Purification method for producing high purity niobium compound and/or tantalum compound | Hirohisa Kikuyama, Masahide Waki, Hiroto Izumi, Hirofumi Yazaki, Kenji Aoki +2 more | 2007-02-13 |