Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363831 | Process for producing magnetic powder having high coercive force | Shinji Umeki | 1982-12-14 |
| 4343834 | Process for preparing magnetic recording medium | Seitoku Saito, Toshiaki Izumi, Hiroshi Sugihara, Takayoshi Kobuke | 1982-08-10 |
| 4321302 | Process for producing magnetic powder having high coercive force | Shinji Umeki, Toshihiro Hamabata, Kazuaki Onuki | 1982-03-23 |
| 4311868 | Process for converting hydrocarbon | Tamotsu Ueno, Takehiko Takahashi, Toshio Hidaka, Makoto Takagawa | 1982-01-19 |