- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/25 - Colour; Spectral 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: 3675
10-year publication summary
|
328
|
282
|
329
|
370
|
336
|
335
|
301
|
239
|
262
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20403 |
64 |
| Siemens Healthcare Diagnostics Inc. | 2000 |
38 |
| Samsung Electronics Co., Ltd. | 138320 |
34 |
| Seiko Epson Corporation | 18966 |
30 |
| Viavi Solutions Inc. | 1395 |
28 |
| Schlumberger Technology Corporation | 10217 |
26 |
| KLA-Tencor Corporation | 2551 |
26 |
| Verifood, Ltd. | 56 |
23 |
| Hitachi High-Tech Corporation | 5014 |
23 |
| Schlumberger Canada Limited | 7137 |
20 |
| Precision Planting LLC | 1007 |
19 |
| Konica Minolta, Inc. | 8510 |
18 |
| 3m Innovative Properties Company | 17968 |
16 |
| F. Hoffmann-La Roche AG | 7942 |
15 |
| The General Hospital Corporation | 4637 |
15 |
| Services Petroliers Schlumberger | 5616 |
15 |
| Labrador Diagnostics LLC | 281 |
15 |
| Schlumberger Technology B.v. | 5058 |
14 |
| The Regents of the University of California | 19479 |
14 |
| Koninklijke Philips Electronics N.V. | 10968 |
13 |
| Other owners | 3209 |