- All sections
- G - Physics
- G02B - Optical elements, systems or apparatus
- G02B 21/33 - Immersion oils
Patent holdings for IPC class G02B 21/33
Total number of patents in this class: 307
10-year publication summary
|
24
|
18
|
41
|
33
|
33
|
26
|
13
|
12
|
14
|
17
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Carl Zeiss Microscopy GmbH | 1280 |
47 |
| Evident Corporation | 1026 |
30 |
| Leica Microsystems CMS GmbH | 1140 |
14 |
| University of Washington | 2453 |
10 |
| Hamamatsu Photonics K.K. | 4697 |
8 |
| Hon Hai Precision Industry Co., Ltd. | 4016 |
6 |
| Tsinghua University | 6233 |
6 |
| 3m Innovative Properties Company | 17458 |
5 |
| The Regents of the University of California | 20815 |
5 |
| Centre National de La Recherche Scientifique | 11059 |
5 |
| Nikon Corporation | 7230 |
5 |
| Riken | 1719 |
5 |
| MGI Tech Co., Ltd | 492 |
5 |
| Damae Medical | 26 |
5 |
| The Arizona Board of Regents on Behalf of the University of Arizona | 2310 |
4 |
| Molecular Devices, LLC | 239 |
4 |
| University of Ottawa | 241 |
4 |
| Standard Biotools Canada Inc. | 100 |
4 |
| Carl Zeiss AG | 917 |
3 |
| Carl Zeiss SMT GmbH | 3352 |
3 |
| Other owners | 129 |