Issued Patents All Time
Showing 25 most recent of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12429784 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Kohei Makisumi, Kenichi Kaku, Haruyuki Tsuji | 2025-09-30 |
| 12422760 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Kohei Makisumi, Kenichi Kaku, Haruyuki Tsuji | 2025-09-23 |
| 12353164 | Electrophotographic apparatus | Akihiro Maruyama, Kenichi Kaku, Shuhei Iwasaki, Kohei Makisumi, Michiyo Sekiya +4 more | 2025-07-08 |
| 12326688 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus | Tatsuya Yamaai, Kenichi Kaku, Shuhei Iwasaki, Akihiro Maruyama | 2025-06-10 |
| 12326689 | Electrophotographic apparatus | Kenichi Kaku, Akihiro Maruyama, Shuhei Iwasaki, Tatsuya Yamaai, Michiyo Sekiya +2 more | 2025-06-10 |
| 11947275 | Electrophotographic apparatus | Shuhei Iwasaki, Akihiro Maruyama, Kenichi Kaku, Michiyo Sekiya, Kohei Makisumi +3 more | 2024-04-02 |
| 11500301 | Electrophotographic photosensitive member, process cartridge, and electrophotographic image forming apparatus | Hideharu Shimozawa, Kenichi Kaku, Tsutomu Nishida, Kazunori Noguchi, Akihiro Maruyama +2 more | 2022-11-15 |
| 11493853 | Electrophotographic photosensitive member, process cartridge and electrophotographic image forming apparatus | Hideharu Shimozawa, Kenichi Kaku, Tsutomu Nishida, Kazunori Noguchi, Akihiro Maruyama +2 more | 2022-11-08 |
| 11340553 | Process cartridge and electrophotographic apparatus | Kohei Makisumi, Fumiyuki Hiyama, Yuichi Kikuchi, Kazuhiro Yamauchi, Hirotaka Araki +1 more | 2022-05-24 |
| 11249407 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus | Tomohito Ishida, Masataka Kawahara, Michiyo Sekiya, Kohei Makisumi | 2022-02-15 |
| 11237493 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus | Kohei Makisumi, Masataka Kawahara, Tomohito Ishida, Michiyo Sekiya | 2022-02-01 |
| 11181837 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Michiyo Sekiya, Masataka Kawahara, Tomohito Ishida, Kohei Makisumi | 2021-11-23 |
| 11137716 | Process cartridge and electrophotographic apparatus | Fumiyuki Hiyama, Kohei Makisumi, Kazuhiro Yamauchi, Yuichi Kikuchi | 2021-10-05 |
| 11126097 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Tomohito Ishida, Masataka Kawahara, Michiyo Sekiya, Kohei Makisumi | 2021-09-21 |
| 11112719 | Process cartridge and electrophotographic apparatus capable of suppressing lateral running while maintaining satisfactory potential function | Kohei Makisumi, Fumiyuki Hiyama, Kazuhiro Yamauchi, Yuichi Kikuchi | 2021-09-07 |
| 10838313 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Kazuko Araki, Masataka Kawahara, Jumpei Kuno | 2020-11-17 |
| 10539888 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Kenichi Kaku, Kazuko Araki, Tomohito Ishida, Michiyo Sekiya | 2020-01-21 |
| 10429753 | Electrophotographic photoconductor, process cartridge, and electrophotographic apparatus | Masato Tanaka, Masataka Kawahara, Jumpei Kuno | 2019-10-01 |
| 10401746 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus | Shoma Hinata, Kazuko Araki, Tsutomu Nishida, Jumpei Kuno, Masataka Kawahara +2 more | 2019-09-03 |
| 10012915 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same | Tsutomu Nishida, Masato Tanaka, Masataka Kawahara, Jumpei Kuno, Hidetoshi Hirano | 2018-07-03 |
| 9921499 | Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and phthalocyanine pigment | Shoma Hinata, Kazuko Sakuma, Tsutomu Nishida, 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, Tsutomu Nishida | 2018-01-16 |
| 9709907 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus | Masato Tanaka, Masataka Kawahara, Jumpei Kuno, Tsutomu Nishida | 2017-07-18 |
| 9645516 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus | Masataka Kawahara, Masato Tanaka, Jumpei Kuno, Tsutomu Nishida | 2017-05-09 |
| 9645515 | Electrophotographic photosensitive member and manufacturing method thereof, process cartridge and electrophotographic apparatus, and phthalocyanine crystal and manufacturing method thereof | Junpei Kuno, Tsutomu Nishida, Masato Tanaka, Masataka Kawahara | 2017-05-09 |