Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886721 | Electrophotographic plate by use of metal naphthalocyanine derivative | Seiji Tai, Nobuyuki Hayashi, Yasushi Iwakabe, Noriyuki Kinjo, Shunichi Numata | 1989-12-12 |
| 4842970 | Electrophotographic plate containing a naphthalocyanine compound | Seiji Tai, Nobuyuki Hayashi | 1989-06-27 |
| 4833264 | 5- or 6-alkoxycarbonyl-2,3-dicyanonaphthalenes | Seiji Tai, Nobuyuki Hayashi | 1989-05-23 |