Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12405554 | Developing device and image forming apparatus | Tamotsu Shimizu, Hiroshi Yamazaki, Junichi Nakagawa, Takuji Watanabe | 2025-09-02 |
| 12346061 | Developing device provided with a toner trapping mechanism | Tamotsu Shimizu, Hiroshi Yamazaki, Junichi Nakagawa, Takuji Watanabe | 2025-07-01 |
| 12092993 | Image forming apparatus | Hiroshi Yamazaki, Junichi Nakagawa, Takuji Watanabe, Tamotsu Shimizu | 2024-09-17 |
| 12078958 | Image forming apparatus | Hiroshi Yamazaki, Junichi Nakagawa, Tamotsu Shimizu, Takuji Watanabe | 2024-09-03 |
| 12007712 | Image forming apparatus | Junichi Nakagawa, Tamotsu Shimizu, Hiroshi Yamazaki, Takuji Watanabe | 2024-06-11 |
| 12001152 | Toner charging state determination method and image forming apparatus | — | 2024-06-04 |
| 11977351 | Image forming apparatus | Takuji Watanabe, Junichi Nakagawa, Hiroshi Yamazaki, Tamotsu Shimizu | 2024-05-07 |
| 11977350 | Image forming apparatus | Junichi Nakagawa, Tamotsu Shimizu, Hiroshi Yamazaki, Takuji Watanabe | 2024-05-07 |
| 11307512 | Image forming apparatus determining toner replacement timing | Kazunori Tanaka, Kanako Morimoto, Tamotsu Shimizu | 2022-04-19 |
| 11143980 | Image forming apparatus | Tamotsu Shimizu, Kanako Morimoto, Kazunori Tanaka | 2021-10-12 |
| 10788771 | Image forming apparatus with charging amount acquisition unit | Tamotsu Shimizu, Yasushi Imanishi | 2020-09-29 |
| 10691052 | Image forming apparatus | Tamotsu Shimizu, Akifumi Yamaguchi, Yasuhiro Tauchi, Koji Suenami | 2020-06-23 |
| 10534281 | Discharge member, charge eliminating device including the same, and image forming apparatus | Tamotsu Shimizu, Hiroka Itani | 2020-01-14 |
| 10365581 | Developing device and image forming apparatus including same | Hiroyuki Hamakawa | 2019-07-30 |
| 10331066 | Image forming device | — | 2019-06-25 |
| 10175608 | Developing device and image forming apparatus provided with same | Tamotsu Shimizu, Akifumi Yamaguchi | 2019-01-08 |
| 9983499 | Discharging member, and charge eliminating device/image forming apparatus including the discharging member | Tamotsu Shimizu, Hiroka Itani | 2018-05-29 |
| 9857732 | Developing device and image forming apparatus provided with same | Tamotsu Shimizu | 2018-01-02 |
| 9846389 | Developer supply control in electrophotographic type image forming apparatus | — | 2017-12-19 |
| 9535356 | Image forming apparatus having a function to apply charge removal light to photosensitive member | Shinji Otani, Norio Kubo, Masashi Fujishima, Koji Suenami, Yoshimi Shimizu | 2017-01-03 |
| 9235162 | Developer storage container and image forming apparatus with same | Ikuo Makie, Minoru Wada, Shizuka Okada, Tamotsu Shimizu | 2016-01-12 |
| 9176427 | Developing device and image forming apparatus therewith | Hiroshi Yamazaki | 2015-11-03 |
| 9063468 | Developing device and image forming apparatus provided therewith | Minoru Wada, Takahisa Nakaue, Tamotsu Shimizu, Ikuo Makie, Takefumi Yotsutsuji +1 more | 2015-06-23 |
| 8989634 | Developer case that suppresses clogging due to developer, developer replenishment unit having the same, and image forming apparatus having the same | Takahisa Nakaue, Tamotsu Shimizu, Ikuo Makie, Eiji Nimura, Koji Kuramashi +2 more | 2015-03-24 |
| 8942600 | Developing apparatus and image forming apparatus | Takahisa Nakaue, Tamotsu Shimizu, Ikuo Makie, Minoru Wada, Takefumi Yotsutsuji +1 more | 2015-01-27 |