Issued Patents All Time
Showing 25 most recent of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12360468 | Polyarylate resin and electrophotographic photosensitive member | Keiji Maruo, Kenji KITAGUCHI | 2025-07-15 |
| 12339618 | Polyarylate resin and electrophotographic photosensitive member | Keiji Maruo, Kenji KITAGUCHI | 2025-06-24 |
| 11067909 | Terphenyl compound, electrophotographic photosensitive member, and method for producing terphenyl compound | Kensuke Kojima, Tomofumi SHIMIZU, Hideki Okada | 2021-07-20 |
| 10996575 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Tomofumi SHIMIZU, Kazuaki EZURE, Hayase Yamamoto | 2021-05-04 |
| 10871723 | Electrophotographic photosensitive member and image forming apparatus | Kensuke Okawa, Seiki Hasunuma | 2020-12-22 |
| 10795273 | Bis-butadiene derivative and electrophotographic photosensitive member | Kensuke Kojima | 2020-10-06 |
| 10761440 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Hiroki Tsurumi, Eiichi Miyamoto | 2020-09-01 |
| 10761439 | Polyarylate resin and electrophotographic photosensitive member | Kensuke Okawa, Seiki Hasunuma, Tomofumi SHIMIZU | 2020-09-01 |
| 10761441 | Production method for electrophotographic photosensitive member | Tomofumi SHIMIZU, Kenji KITAGUCHI, Kiichiro OJI | 2020-09-01 |
| 10732526 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Tomofumi SHIMIZU, Keiji Maruo | 2020-08-04 |
| 10730819 | Naphthalenedicarboxylic acid dichloride production method | — | 2020-08-04 |
| 10649351 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Tomofumi SHIMIZU, Keiji Maruo | 2020-05-12 |
| 10509309 | Polyarylate resin and electrophotographic photosensitive member | — | 2019-12-17 |
| 10379451 | Polyarylate resin and electrophotographic photosensitive member | Kensuke Okawa, Akihiko Ogata, Kenji KITAGUCHI, Tomofumi SHIMIZU | 2019-08-13 |
| 10372048 | Electrophotographic photosensitive member | Kensuke Kojima, Tomofumi SHIMIZU | 2019-08-06 |
| 10359713 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Tomofumi SHIMIZU | 2019-07-23 |
| 10295918 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Tomofumi SHIMIZU, Keiji Maruo | 2019-05-21 |
| 10273331 | Polyarylate resin and electrophotographic photosensitive member | Kenji KITAGUCHI, Kensuke Okawa, Seiki Hasunuma, Tomofumi SHIMIZU | 2019-04-30 |
| 10191397 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Keiji Maruo, Tomofumi SHIMIZU | 2019-01-29 |
| 10031431 | Electrophotographic photosensitive member | Takahiro Oki, Kensuke Okawa, Akihiko Ogata | 2018-07-24 |
| 9964869 | Triarylamine derivative, electrophotographic photosensitive member, and method for producing electrophotographic photosensitive member | Kensuke Okawa, Hideki Okada, Fumio Sugai, Kensuke Kojima | 2018-05-08 |
| 9939744 | Multi-layer electrophotographic photosensitive member | Kensuke Okawa, Junichiro Otsubo, Akihiko Ogata | 2018-04-10 |
| 9933712 | Multi-layer electrophotographic photosensitive member, process cartridge, and image forming apparatus | Akihiko Ogata, Hideki Okada, Kensuke Okawa | 2018-04-03 |
| 9829811 | Electrophotographic photosensitive member, process cartridge, and image forming apparatus | Takahiro Oki, Keiji Maruo | 2017-11-28 |
| 9575423 | Electrophotographic photosensitive member | Kensuke Okawa, Akihiko Ogata, Takahiro Oki | 2017-02-21 |