Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8436055 | Modified acidic ion-exchange resin and method for preparing bisphenol | Toshihiro Takai, Kenji Fujiwara | 2013-05-07 |
| 8426479 | Modified ion exchange resin and process for producing bisphenols | Toshihiro Takai, Hideaki Nakamura | 2013-04-23 |
| 8263521 | Process for producing bisphenol A | Yuko Maruyama, Toshihiro Takai, Kenji Fujiwara | 2012-09-11 |
| 7968612 | Modified ion exchange resin and process for producing bisphenols | Toshihiro Takai, Hideaki Nakamura | 2011-06-28 |
| 5631338 | Process for preparing bisphenol A | Kaoru Inoue, Tuneyuki Ohkubo | 1997-05-20 |
| 4482850 | Control circuit for DC capstan motor | Masakazu Sonoda, Minoru Ozawa | 1984-11-13 |