Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5169610 | Method for the purification of rare earth oxysulfide | Norifumi Yoshida | 1992-12-08 |
| 4994880 | Semiconductor device constituting bipolar transistor | Naohito Kato, Yoshiyuki Miyase, Tomoatsu Makino, Masami Yamaoka, Takeshi Matsui +3 more | 1991-02-19 |