- 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: 1489
10-year publication summary
128
|
110
|
136
|
147
|
124
|
115
|
103
|
127
|
99
|
16
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
KLA-Tencor Corporation | 2550 |
77 |
KLA Corporation | 1406 |
45 |
J.A. Woollam Co., Inc. | 157 |
34 |
Samsung Electronics Co., Ltd. | 139551 |
33 |
Onto Innovation Inc. | 354 |
28 |
Sony Corporation | 31518 |
24 |
Korea Research Institute of Standards and Science | 659 |
24 |
ASML Netherlands B.V. | 7190 |
22 |
Halliburton Energy Services, Inc. | 20466 |
15 |
FUJIFILM Corporation | 28841 |
14 |
Ricoh Company, Ltd. | 13230 |
14 |
Centre National de La Recherche Scientifique | 10140 |
11 |
Koninklijke Philips N.V. | 24106 |
11 |
Sony Group Corporation | 12761 |
11 |
Applied Materials, Inc. | 17808 |
10 |
Nxgen Partners IP, LLC | 135 |
10 |
DEKA Products Limited Partnership | 1715 |
9 |
Corning Incorporated | 10145 |
8 |
Wisconsin Alumni Research Foundation | 3838 |
8 |
Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. | 4821 |
8 |
Other owners | 1073 |