- All sections
- G - Physics
- G03G - Electrographyelectrophotographymagnetography
- G03G 21/18 - Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge
Patent holdings for IPC class G03G 21/18
Total number of patents in this class: 4021
10-year publication summary
|
327
|
307
|
291
|
408
|
344
|
291
|
298
|
263
|
279
|
66
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 42088 |
1277 |
| Brother Industries, Ltd. | 12889 |
1073 |
| FUJIFILM Business Innovation Corp. | 7845 |
210 |
| Hewlett-Packard Development Company, L.P. | 25403 |
176 |
| Lexmark International, Inc. | 1584 |
158 |
| Ricoh Company, Ltd. | 13313 |
153 |
| Canon Kabushiki Kaisha | 7200 |
130 |
| Kyocera Document Solutions Inc. | 6020 |
116 |
| Brother Kogyo Kabushikikaisha | 1789 |
115 |
| Print-Rite ? Unicorn Image Products Co., Ltd. of Zhuhai | 223 |
59 |
| Zhuhai Pantum Electronics Co., Ltd. | 249 |
45 |
| Mitsubishi Chemical Corporation | 4683 |
39 |
| Ninestar Corporation | 58 |
34 |
| Zhuhai Ninestar Information Technology Co., Ltd. | 49 |
34 |
| Toshiba TEC Corporation | 3891 |
33 |
| Jiangxi Yibo E-Tech Co., Ltd. | 54 |
29 |
| Oki Electric Industry Co., Ltd. | 1581 |
28 |
| Sharp Corporation | 10432 |
26 |
| Mitsubishi Rayon Co., Ltd. | 871 |
15 |
| Apex Technology Co., Ltd. | 23 |
15 |
| Other owners | 256 |