Issued Patents All Time
Showing 25 most recent of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11703773 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Yuka Ishiduka, Tatsuya Ohsawa | 2023-07-18 |
| 11619888 | Electrophotographic image forming apparatus and process cartridge | Yuka Ishiduka, Tatsuya Ohsawa | 2023-04-04 |
| 11500301 | Electrophotographic photosensitive member, process cartridge, and electrophotographic image forming apparatus | Hideharu Shimozawa, Kenichi Kaku, Kazunori Noguchi, Akihiro Maruyama, Kaname Watariguchi +2 more | 2022-11-15 |
| 11493853 | Electrophotographic photosensitive member, process cartridge and electrophotographic image forming apparatus | Hideharu Shimozawa, Kenichi Kaku, Kazunori Noguchi, Akihiro Maruyama, Kaname Watariguchi +2 more | 2022-11-08 |
| 11392050 | Process cartridge and electrophotographic apparatus | Yuka Ishiduka, Kenichi Kaku, Nobuhiro Nakamura, Hiroyuki Watanabe, Hideharu Shimozawa +3 more | 2022-07-19 |
| 11366402 | Process cartridge and electrophotographic apparatus using the same | Yuka Ishiduka, Hideharu Shimozawa, Nobuhiro Nakamura, Hiroyuki Watanabe, Kenichi Kaku +4 more | 2022-06-21 |
| 11256186 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus | Hideharu Shimozawa, Atsushi Okuda, Yuka Ishiduka, Kenichi Kaku, Nobuhiro Nakamura +1 more | 2022-02-22 |
| 11003102 | Electrophotographic image forming apparatus and process cartridge | Yuka Ishiduka, Hideharu Shimozawa, Nobuhiro Nakamura, Hiroyuki Watanabe | 2021-05-11 |
| 10838315 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus | Hideharu Shimozawa, Atsushi Okuda, Yuka Ishiduka, Nobuhiro Nakamura, Hiroyuki Watanabe | 2020-11-17 |
| 10831118 | Electrophotographic photosensitive member and method for producing electrophotographic photosensitive member | Hiroyuki Watanabe, Yuka Ishiduka, Atsushi Okuda, Hideharu Shimozawa, Nobuhiro Nakamura +3 more | 2020-11-10 |
| 10747130 | Process cartridge and electrophotographic apparatus | Atsushi Okuda, Yuka Ishiduka, Nobuhiro Nakamura, Hiroyuki Watanabe, Hideharu Shimozawa +3 more | 2020-08-18 |
| 10747131 | Electrophotographic photosensitive member and method for manufacturing the same as well as process cartridge and electrophotographic image-forming apparatus | Hiroyuki Watanabe, Yuka Ishiduka, Atsushi Okuda, Hideharu Shimozawa, Nobuhiro Nakamura +1 more | 2020-08-18 |
| 10691033 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Atsushi Okuda, Yuka Ishiduka, Nobuhiro Nakamura, Hiroyuki Watanabe, Hideharu Shimozawa | 2020-06-23 |
| 10642177 | Process cartridge and image-forming apparatus | Nobuhiro Nakamura, Atsushi Okuda, Yuka Ishiduka, Hiroyuki Watanabe, Hideharu Shimozawa | 2020-05-05 |
| 10558133 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus | Nobuhiro Nakamura, Atsushi Okuda, Yuka Ishiduka, Hiroyuki Watanabe, Hideharu Shimozawa +3 more | 2020-02-11 |
| 10558132 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Yuka Ishiduka, Atsushi Okuda, Hiroyuki Watanabe, Hideharu Shimozawa, Nobuhiro Nakamura +6 more | 2020-02-11 |
| 10539892 | Electrophotographic photosensitive member, process cartridge, and electrophotographic image-forming apparatus | Yuka Ishiduka, Kenichi Kaku, Nobuhiro Nakamura, Hiroyuki Watanabe, Hideharu Shimozawa +1 more | 2020-01-21 |
| 10416581 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Yota Ito, Shoma Hinata, Tatsuya Yamaai, Akira Sakakibara, Daisuke Miura | 2019-09-17 |
| 10401746 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Kaname Watariguchi, Shoma Hinata, Kazuko Araki, Jumpei Kuno, Masataka Kawahara +2 more | 2019-09-03 |
| 10209637 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Akira Sakakibara, Daisuke Miura, Yota Ito, Shoma Hinata, Tatsuya Yamaai +1 more | 2019-02-19 |
| 10012915 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same | Masato Tanaka, Masataka Kawahara, Jumpei Kuno, Kaname Watariguchi, Hidetoshi Hirano | 2018-07-03 |
| 9921499 | Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and phthalocyanine pigment | Kaname Watariguchi, Shoma Hinata, Kazuko Sakuma, Jumpei Kuno, Hirofumi Kumoi +4 more | 2018-03-20 |
| 9869032 | Manufacturing method of phthalocyanine crystal by milling crystal transformation for at least 1,000 hours | Masataka Kawahara, Masato Tanaka, Jumpei Kuno, Kaname Watariguchi | 2018-01-16 |
| 9772596 | Image forming apparatus and electrophotographic photosensitive member | Takahiro Mitsui, Tomohisa Itagaki, Koji Takahashi, Hiroki Uematsu, Yasuhiro Kawai +1 more | 2017-09-26 |
| 9746790 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same | Masato Tanaka, Masataka Kawahara | 2017-08-29 |