- All sections
- G - Physics
- G03B - Apparatus or arrangements for taking photographs or for projecting or viewing them; apparatus or arrangements employing analogous techniques using waves other than optical waves; accessories therefor
- G03B 21/53 - Means for automatic focusing, e.g. to compensate thermal effects
Patent holdings for IPC class G03B 21/53
Total number of patents in this class: 136
10-year publication summary
|
15
|
13
|
15
|
15
|
17
|
12
|
8
|
8
|
18
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 18724 |
18 |
| Coretronic Corporation | 1165 |
6 |
| Samsung Electronics Co., Ltd. | 131630 |
5 |
| Canon Inc. | 36841 |
5 |
| Pentair Water Pool and Spa, Inc. | 457 |
5 |
| Ricoh Company, Ltd. | 13266 |
4 |
| Appotronics Corporation Limited | 1111 |
4 |
| KEYENCE Corporation | 372 |
4 |
| Piqs Technology (Shenzhen) Limited | 30 |
4 |
| Iview Displays (Shenzhen) Company Ltd. | 198 |
4 |
| FUJIFILM Corporation | 27102 |
3 |
| ZTE Corporation | 39218 |
3 |
| Butterfly Technology (Shenzhen) Limited | 9 |
3 |
| Chengdu XGimi Technology Co., Ltd. | 112 |
3 |
| Sony Corporation | 32931 |
2 |
| Nikon Corporation | 7162 |
2 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
2 |
| Konica Minolta, Inc. | 8349 |
2 |
| CJ 4D Plex Co., Ltd. | 26 |
2 |
| RedwoodVentures, LTD | 22 |
2 |
| Other owners | 53 |