- 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: 1511
10-year publication summary
|
128
|
110
|
136
|
147
|
124
|
115
|
103
|
129
|
100
|
45
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| KLA-Tencor Corporation | 2546 |
77 |
| KLA Corporation | 1496 |
55 |
| Samsung Electronics Co., Ltd. | 143303 |
34 |
| J.A. Woollam Co., Inc. | 154 |
34 |
| Onto Innovation Inc. | 359 |
28 |
| Korea Research Institute of Standards and Science | 668 |
25 |
| Sony Corporation | 31183 |
24 |
| ASML Netherlands B.V. | 7291 |
22 |
| Halliburton Energy Services, Inc. | 20684 |
15 |
| FUJIFILM Corporation | 29172 |
14 |
| Ricoh Company, Ltd. | 13205 |
14 |
| Centre National de La Recherche Scientifique | 10266 |
11 |
| Koninklijke Philips N.V. | 24468 |
11 |
| Sony Group Corporation | 13361 |
11 |
| Applied Materials, Inc. | 18334 |
10 |
| Nxgen Partners IP, LLC | 136 |
10 |
| Corning Incorporated | 10184 |
9 |
| The Arizona Board of Regents on Behalf of the University of Arizona | 2128 |
9 |
| DEKA Products Limited Partnership | 1741 |
9 |
| Wisconsin Alumni Research Foundation | 3862 |
8 |
| Other owners | 1081 |