Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6187493 | Electrophotosensitive material | Masato Katsukawa, Ayako Sugase, Mitsuo Ihara, Ichiro Yamazato, Yuka Nakamura | 2001-02-13 |
| 5994012 | Naphthoquinone derivative and electrophotosensitive material using same | Yukimasa Watanabe, Sakae Saito, Hirofumi Kawaguchi, Fumio Sugai, Atsushi Fujii +7 more | 1999-11-30 |
| 5863688 | Naphthoquinone derivative | Yukimasa Watanabe, Sakae Saito, Hirofumi Kawaguchi, Fumio Sugai, Atsushi Fujii +7 more | 1999-01-26 |
| 5780194 | Electrophotosensitive material | Masato Katsukawa, Ayako Sugase, Mitsuo Ihara, Ichiro Yamazato, Yuka Nakamura | 1998-07-14 |
| 5481165 | Drive device for a sewing machine | Hiroaki Tsuboyama | 1996-01-02 |
| 5273853 | Black photoconductive toner having sensitivity to light in the wavelength range of semiconductor lasers | Yumiko Sano, Seiji Kado, Kazushige Inoue | 1993-12-28 |
| 5260158 | Photoconductive toner comprising a sensitizer dye | Hiroyuki Yamaji, Yumiko Sano | 1993-11-09 |
| 5114817 | Cyan-colored photosensitive toner containing zinc oxide | Yumiko Sano | 1992-05-19 |
| 5111759 | Inconstant-thickness workpiece feeding apparatus | Toru Hiramatsu | 1992-05-12 |