Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6863966 | Black magnetic acicular composite particles for magnetic recording medium and magnetic recording medium using the same | Kazuyuki Hayashi, Mamoru Kamigaki, Yasuyuki Tanaka, Keisuke Iwasaki | 2005-03-08 |
| 6838218 | Black toner | Kazuyuki Hayashi, Keisuke Iwasaki | 2005-01-04 |