- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/956 - Inspecting patterns on the surface of objects
Patent holdings for IPC class G01N 21/956
Total number of patents in this class: 2729
10-year publication summary
|
195
|
169
|
205
|
249
|
222
|
196
|
185
|
172
|
156
|
129
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ASML Netherlands B.V. | 7508 |
275 |
| KLA-Tencor Corporation | 2543 |
221 |
| Hitachi High-Technologies Corporation | 1996 |
159 |
| KLA Corporation | 1620 |
148 |
| Hitachi High-Tech Corporation | 5418 |
139 |
| Samsung Electronics Co., Ltd. | 148173 |
63 |
| Nikon Corporation | 7297 |
54 |
| NuFlare Technology, Inc. | 871 |
54 |
| Koh Young Technology Inc. | 349 |
42 |
| Carl Zeiss SMT GmbH | 3043 |
41 |
| Tokyo Electron Limited | 13013 |
40 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 44282 |
39 |
| Nova Ltd. | 172 |
34 |
| ASML Holding N.V. | 500 |
31 |
| Toray Engineering Co., Ltd. | 503 |
28 |
| CKD Corporation | 456 |
28 |
| Sumco Corporation | 1115 |
26 |
| Omron Corporation | 7312 |
24 |
| Hamamatsu Photonics K.K. | 4461 |
22 |
| Sharp Kabushiki Kaisha | 18679 |
21 |
| Other owners | 1240 |