Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4943418 | Method of preparing high-purity manganese compounds | Kiyoshi Matsuura, Tatsuo Seino, Yoshiyuki Kimura, Hiroshi Kemmochi, Koichi Yoshioka +1 more | 1990-07-24 |
| 4472369 | Process for producing ferrites | Tsugunori Honda, Toshio Toyota, Mitsuharu Tominaga, Koichi Yoshioka | 1984-09-18 |