- 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: 3537
10-year publication summary
267
|
328
|
282
|
329
|
368
|
336
|
322
|
292
|
234
|
84
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
64 |
Siemens Healthcare Diagnostics Inc. | 1946 |
37 |
Samsung Electronics Co., Ltd. | 131630 |
30 |
Seiko Epson Corporation | 18724 |
29 |
Viavi Solutions Inc. | 1363 |
28 |
KLA-Tencor Corporation | 2574 |
26 |
Schlumberger Technology Corporation | 9690 |
24 |
Verifood, Ltd. | 53 |
20 |
Schlumberger Canada Limited | 6913 |
19 |
3m Innovative Properties Company | 18406 |
18 |
Konica Minolta, Inc. | 8349 |
18 |
Hitachi High-Tech Corporation | 4424 |
18 |
Commissariat à l'énergie atomique et aux energies alternatives | 10525 |
16 |
Hewlett-Packard Development Company, L.P. | 28538 |
15 |
The General Hospital Corporation | 4517 |
15 |
Labrador Diagnostics LLC | 287 |
15 |
F. Hoffmann-La Roche AG | 7958 |
14 |
Xerox Corporation | 7503 |
14 |
Services Petroliers Schlumberger | 5426 |
14 |
Schlumberger Technology B.v. | 4951 |
13 |
Other owners | 3090 |