Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8624065 | Methods for producing oxidized cyclic phenol sulfides | Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Naohiro Tarumoto | 2014-01-07 |
| 8263786 | Methods for producing cyclic phenol sulfides | Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Naohiro Tarumoto | 2012-09-11 |
| 8232429 | Methods for producing oxidized cyclic phenol sulfides | Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Naohiro Tarumoto | 2012-07-31 |
| 7901858 | Mixed cyclic phenol sulfides, and charge control agents and toners using the same | Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masaki Okubo +2 more | 2011-03-08 |
| 7820832 | Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the same | Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masaki Okubo +2 more | 2010-10-26 |
| 7709172 | Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the same | Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masaki Okubo +2 more | 2010-05-04 |