- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/21 - Polarisation-affecting properties
Patent holdings for IPC class G01N 21/21
Total number of patents in this class: 1424
10-year publication summary
|
122
|
128
|
110
|
136
|
147
|
124
|
114
|
100
|
122
|
28
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| KLA-Tencor Corporation | 2574 |
77 |
| J.A. Woollam Co., Inc. | 166 |
34 |
| KLA Corporation | 1223 |
32 |
| Samsung Electronics Co., Ltd. | 131630 |
30 |
| Sony Corporation | 32931 |
25 |
| Onto Innovation Inc. | 340 |
25 |
| ASML Netherlands B.V. | 6816 |
22 |
| Korea Research Institute of Standards and Science | 639 |
22 |
| Halliburton Energy Services, Inc. | 20165 |
15 |
| FUJIFILM Corporation | 27102 |
14 |
| Ricoh Company, Ltd. | 13266 |
14 |
| Centre National de La Recherche Scientifique | 9632 |
12 |
| Koninklijke Philips N.V. | 22975 |
11 |
| Nxgen Partners IP, LLC | 132 |
10 |
| Applied Materials, Inc. | 16587 |
9 |
| DEKA Products Limited Partnership | 1640 |
9 |
| Ecole Polytechnique | 308 |
9 |
| Sony Group Corporation | 10730 |
9 |
| Wisconsin Alumni Research Foundation | 3774 |
8 |
| Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. | 4569 |
8 |
| Other owners | 1029 |