Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5213929 | Titanyl phthaloycyanine crystal, method of manufacture thereof and its use for electrophotographic photosensitive material | Shigemasa Takano, Naoyuki Matsui, Tomohisa Gotoh, Mitsuo Usuba | 1993-05-25 |
| 5008173 | Phthalocyanine crystal, process for manufacture thereof and its use for electrophotographic photosensitive material | Keiichi Takano, deceased, Tomohisa Gotou | 1991-04-16 |
| 4994566 | Phthalocyanine crystal, process for manufacture thereof and its use for electrophotographic photosensitive material | Keiichi Takano, deceased, Tomohisa Gotou | 1991-02-19 |