Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7531691 | Method for producing naphthalene carboxylic acid amide compound | Hiroyuki Wakamori | 2009-05-12 |
| 7449608 | Naphthol derivative and charge control agent comprising the same | Ryuzo Ueno, Masaya Kitayama, Kenji Minami, Hiroyuki Wakamori | 2008-11-11 |
| 7169523 | Charge controllers | Ryuzo Ueno, Masaya Kitayama, Kenji Minami, Hiroyuki Wakamori | 2007-01-30 |
| 7074536 | Alkylenebisnaphtol derivative and charge control agent which consists of the same | Ryuzo Ueno, Masaya Kitayama, Kenji Minami, Hiroyuki Wakamori | 2006-07-11 |
| 7030261 | Method for preparing 2-hydroxy-6-ureidocarbonyl naphthalene derivative | Masaya Kitayama, Hiroyuki Wakamori | 2006-04-18 |