Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4995999 | Method of producing magnetic carbon black | Toshio Nakada, Fumio Takemura, Kazuhito Kataoka | 1991-02-26 |
| 4900465 | Process for preparing magnetic carbon black | Toshio Nakada, Fumio Takemura, Kazuhito Kataoka | 1990-02-13 |