Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6174639 | Positive charging color toner | Yoshitake Shimizu, Takahiro Ishihara, Hiroshi Shimoyama, Toyotsune Inoue, Kazuya Nagao +3 more | 2001-01-16 |
| 6096467 | Positive charging color toner | Yoshitake Shimizu, Takahiro Ishihara, Hiroshi Shimoyama, Toyotsune Inoue, Kazuya Nagao +3 more | 2000-08-01 |