- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/55 - Specular reflectivity
Patent holdings for IPC class G01N 21/55
Total number of patents in this class: 2123
10-year publication summary
|
144
|
136
|
143
|
118
|
103
|
113
|
113
|
71
|
93
|
40
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Koninklijke Philips Electronics N.V. | 9431 |
47 |
| KLA-Tencor Corporation | 2544 |
44 |
| Applied Materials, Inc. | 18819 |
31 |
| Canon Inc. | 40280 |
30 |
| Samsung Electronics Co., Ltd. | 147334 |
27 |
| GE Healthcare Bio-Sciences AB | 540 |
22 |
| ASML Netherlands B.V. | 7429 |
20 |
| 3m Innovative Properties Company | 17812 |
18 |
| Onto Innovation Inc. | 360 |
16 |
| The Regents of the University of California | 20035 |
15 |
| Ricoh Company, Ltd. | 13292 |
15 |
| Koninklijke Philips N.V. | 24827 |
15 |
| Corning Incorporated | 10294 |
14 |
| Robert Bosch GmbH | 42784 |
13 |
| Carl Zeiss SMT GmbH | 3016 |
13 |
| Centre National de La Recherche Scientifique | 10498 |
12 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 43158 |
12 |
| KLA Corporation | 1598 |
12 |
| The Boeing Company | 20098 |
11 |
| Apple Inc. | 55345 |
10 |
| Other owners | 1726 |