- 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: 3948
10-year publication summary
|
282
|
329
|
371
|
338
|
340
|
308
|
257
|
286
|
247
|
108
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21257 |
63 |
| Siemens Healthcare Diagnostics Inc. | 2129 |
48 |
| Samsung Electronics Co., Ltd. | 155224 |
36 |
| Viavi Solutions Inc. | 1519 |
30 |
| Seiko Epson Corporation | 20081 |
29 |
| Schlumberger Technology Corporation | 11584 |
28 |
| SCIO Solutions Ltd | 46 |
27 |
| KLA-Tencor Corporation | 2522 |
26 |
| Hitachi High-Tech Corporation | 5694 |
25 |
| Precision Planting LLC | 1170 |
22 |
| Schlumberger Canada Limited | 7588 |
20 |
| Konica Minolta, Inc. | 9056 |
20 |
| 3m Innovative Properties Company | 17491 |
18 |
| The Regents of the University of California | 20590 |
18 |
| California Institute of Technology | 4023 |
18 |
| KLA Corporation | 1812 |
17 |
| Panasonic Intellectual Property Management Co., Ltd. | 33812 |
16 |
| Services Petroliers Schlumberger | 5996 |
16 |
| Schlumberger Technology B.v. | 5282 |
15 |
| Applied Materials, Inc. | 20145 |
15 |
| Other owners | 3441 |