Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7964626 | Process for producing N,N′-carbonyldiimidazole | Norimasa Yokoyama, Masateru Yasumura | 2011-06-21 |
| 7901858 | Mixed cyclic phenol sulfides, and charge control agents and toners using the same | Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Masafumi Umekawa, Masaki Okubo +2 more | 2011-03-08 |