- 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: 3936
10-year publication summary
|
282
|
329
|
371
|
338
|
340
|
308
|
257
|
286
|
246
|
97
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21242 |
63 |
| Siemens Healthcare Diagnostics Inc. | 2126 |
48 |
| Samsung Electronics Co., Ltd. | 154751 |
36 |
| Viavi Solutions Inc. | 1511 |
30 |
| Seiko Epson Corporation | 20043 |
29 |
| Schlumberger Technology Corporation | 11549 |
28 |
| KLA-Tencor Corporation | 2523 |
26 |
| SCIO Solutions Ltd | 45 |
26 |
| Hitachi High-Tech Corporation | 5676 |
25 |
| Precision Planting LLC | 1171 |
22 |
| Schlumberger Canada Limited | 7571 |
20 |
| Konica Minolta, Inc. | 9048 |
20 |
| 3m Innovative Properties Company | 17507 |
18 |
| The Regents of the University of California | 20587 |
18 |
| California Institute of Technology | 4017 |
18 |
| KLA Corporation | 1795 |
17 |
| Panasonic Intellectual Property Management Co., Ltd. | 33690 |
16 |
| Services Petroliers Schlumberger | 5981 |
16 |
| Schlumberger Technology B.v. | 5270 |
15 |
| Applied Materials, Inc. | 20112 |
15 |
| Other owners | 3430 |