- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/25 - ColourSpectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
Patent holdings for IPC class G01N 21/25
Total number of patents in this class: 3804
10-year publication summary
|
300
|
265
|
303
|
346
|
303
|
311
|
286
|
237
|
267
|
163
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20946 |
64 |
| Siemens Healthcare Diagnostics Inc. | 2079 |
44 |
| Samsung Electronics Co., Ltd. | 147622 |
36 |
| Viavi Solutions Inc. | 1452 |
30 |
| Seiko Epson Corporation | 19556 |
29 |
| Schlumberger Technology Corporation | 10881 |
28 |
| KLA-Tencor Corporation | 2544 |
26 |
| Hitachi High-Tech Corporation | 5374 |
25 |
| SCIO Solutions Ltd | 43 |
25 |
| Precision Planting LLC | 1127 |
22 |
| Schlumberger Canada Limited | 7366 |
20 |
| Konica Minolta, Inc. | 8789 |
19 |
| The Regents of the University of California | 20087 |
18 |
| 3m Innovative Properties Company | 17781 |
16 |
| Panasonic Intellectual Property Management Co., Ltd. | 31882 |
16 |
| California Institute of Technology | 3986 |
16 |
| Services Petroliers Schlumberger | 5828 |
16 |
| F. Hoffmann-La Roche AG | 7947 |
15 |
| Schlumberger Technology B.v. | 5183 |
15 |
| The General Hospital Corporation | 4771 |
15 |
| Other owners | 3309 |