Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11003101 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Yuko Iwashita | 2021-05-11 |
| 10802411 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Yuko Iwashita, Kazutaka Sugimoto | 2020-10-13 |
| 10635008 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Yuko Iwashita, Kazutaka Sugimoto | 2020-04-28 |
| 10539889 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Yuko Iwashita, Kazutaka Sugimoto | 2020-01-21 |
| 9298112 | Method of manufacturing positively-charged single-layer electrophotographic photoreceptor, positively-charged single-layer electrophotographic photoreceptor, and image forming apparatus | Yasufumi Mizuta, Sakae Saito, Keizo Kimoto, Syoji Itsumi, Hiroshi Takemoto | 2016-03-29 |
| 9285692 | Positively-charged single-layer electrophotographic photoreceptor and image forming apparatus | Yasufumi Mizuta, Keizo Kimoto | 2016-03-15 |
| 9217981 | Positively-charged single-layer electrophotographic photoreceptor and image forming apparatus | Keizo Kimoto, Sakae Saito, Yasufumi Mizuta, Syoji Itsumi, Hiroshi Takemoto | 2015-12-22 |
| 9141007 | Monolayer type photoconductor and image forming device | Yuko Iwashita, Daisuke Kuboshima, Keiji Maruo, Shiho Kuboshima | 2015-09-22 |
| 8679710 | Electrophotographic photoreceptor and image forming apparatus | Daisuke Kuboshima, Eiichi Miyamoto, Norio Nakai, Yoshio Inagaki, Hideki Okada +2 more | 2014-03-25 |
| 8642236 | Electro photographic photoconductor and color image forming apparatus | Yuko Iwashita, Yukimasa Watanabe | 2014-02-04 |
| 7844201 | Color image forming apparatus and color image forming method | Yuko Iwashita | 2010-11-30 |
| 7838191 | Electrophotographic photoconductor having titanyl phthalocyanine and image forming apparatus | Daisuke Kuboshima, Yuko Iwashita | 2010-11-23 |
| 7754402 | Electrophotographic photoconductive member and image forming apparatus | Shiho Kuboshima, Daisuke Kuboshima, Yuko Iwashita | 2010-07-13 |
| 7700251 | Electrophotographic photoconductor and image-forming apparatus | Norio Nakai, Daisuke Kuboshima, Yoshio Inagaki, Hideki Okada, Tetsuya Ichiguchi +1 more | 2010-04-20 |
| 7416825 | Single layer type electrophotographic photoconductor and image forming device | Daisuke Kuboshima, Norio Nakai | 2008-08-26 |
| 7101647 | Electrophotosensitive material | Jun Azuma, Daisuke Kuboshima, Hisakazu Honma | 2006-09-05 |
| 7057034 | Titanyl phthalocyanine crystal and production method of the same, and electrophotosensitive material | Daisuke Kuboshima, Hisakazu Honma, Jun Azuma, Eiichi Miyamoto | 2006-06-06 |
| 6528645 | Titanyl phthalocyanine crystal and production method of the same, and electrophotosensitive material and production method of the same | Yukimasa Watanabe, Hirofumi Kawaguchi, Mitsuo Ihara, Susumu Hiroshima, Daisuke Kuboshima | 2003-03-04 |
| 6391505 | Phthalocyanine crystal and its production, and electrophotosensitive material using the same | Yukimasa Watanabe | 2002-05-21 |
| 6376142 | Electrophotosensitive material containing specific maleimide derivative | Fumio Sugai | 2002-04-23 |
| 6090514 | Electrophotographic photoreceptor | Mikio Kakui, Hirofumi Kawaguchi, Akihiko Kawahara, Yoshio Inagaki, Ayako Yashima | 2000-07-18 |
| 6063534 | Nitro group-containing naphthoquinone derivatives and photosensitive material using the same for electrophotography | — | 2000-05-16 |
| 6022658 | Nitro group-containing naphthoquinone derivatives and photosensitive material using the same for electrophotography | — | 2000-02-08 |
| 5976742 | Naphthoquinone derivative and electrophotographic material using the naphthoquinone derivative | Fumio Sugai, Nobuko Akiba | 1999-11-02 |