Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6638675 | Black magnetic toner | Kazuyuki Hayashi, Hiroko Morii, Yasuyuki Tanaka | 2003-10-28 |
| 6562532 | Black magnetic toner and black magnetic composite particles therefor | Kazuyuki Hayashi, Hiroko Morii, Yasuyuki Tanaka | 2003-05-13 |