- 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: 1642
10-year publication summary
|
110
|
136
|
147
|
125
|
115
|
103
|
132
|
106
|
97
|
96
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| KLA-Tencor Corporation | 2517 |
73 |
| KLA Corporation | 1871 |
70 |
| Samsung Electronics Co., Ltd. | 158605 |
47 |
| J.A. Woollam Co., Inc. | 143 |
37 |
| Onto Innovation Inc. | 397 |
37 |
| Korea Research Institute of Standards and Science | 691 |
27 |
| Sony Corporation | 30097 |
24 |
| ASML Netherlands B.V. | 7987 |
22 |
| Applied Materials, Inc. | 20514 |
17 |
| Halliburton Energy Services, Inc. | 21296 |
15 |
| FUJIFILM Corporation | 30628 |
15 |
| Ricoh Company, Ltd. | 13334 |
14 |
| Sony Group Corporation | 15879 |
14 |
| The Arizona Board of Regents on Behalf of the University of Arizona | 2313 |
11 |
| Seoul National University R&db Foundation | 4224 |
11 |
| Centre National de La Recherche Scientifique | 11077 |
10 |
| Koninklijke Philips N.V. | 25978 |
10 |
| Nxgen Partners IP, LLC | 137 |
10 |
| Corning Incorporated | 10518 |
9 |
| DEKA Products Limited Partnership | 1900 |
9 |
| Other owners | 1160 |