- All sections
- G - Physics
- G03G - Electrography; electrophotography; magnetography
- 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: 3754
10-year publication summary
|
279
|
332
|
312
|
293
|
420
|
344
|
297
|
289
|
251
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 38016 |
1143 |
| Brother Industries, Ltd. | 12888 |
1057 |
| FUJIFILM Business Innovation Corp. | 7398 |
188 |
| Hewlett-Packard Development Company, L.P. | 27484 |
170 |
| Lexmark International, Inc. | 1704 |
151 |
| Ricoh Company, Ltd. | 13202 |
142 |
| Canon Kabushiki Kaisha | 6935 |
128 |
| Brother Kogyo Kabushikikaisha | 1730 |
113 |
| Kyocera Document Solutions Inc. | 5314 |
100 |
| Print-Rite ? Unicorn Image Products Co., Ltd. of Zhuhai | 232 |
59 |
| Mitsubishi Chemical Corporation | 4430 |
38 |
| Ninestar Corporation | 58 |
33 |
| Zhuhai Pantum Electronics Co., Ltd. | 211 |
32 |
| Toshiba TEC Corporation | 3686 |
31 |
| Oki Electric Industry Co., Ltd. | 1604 |
29 |
| Sharp Corporation | 10194 |
25 |
| Jiangxi Yibo E-Tech Co., Ltd. | 40 |
24 |
| Zhuhai Ninestar Information Technology Co., Ltd. | 27 |
17 |
| Mitsubishi Rayon Co., Ltd. | 949 |
15 |
| Apex Technology Co., Ltd. | 23 |
15 |
| Other owners | 244 |