- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
Patent holdings for IPC class G01N 21/31
Total number of patents in this class: 3832
10-year publication summary
|
232
|
253
|
286
|
339
|
302
|
376
|
377
|
333
|
359
|
222
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20924 |
115 |
| Shimadzu Corporation | 6183 |
39 |
| Schlumberger Technology Corporation | 10802 |
34 |
| Samsung Electronics Co., Ltd. | 147003 |
29 |
| Siemens Healthcare Diagnostics Inc. | 2071 |
27 |
| Koninklijke Philips N.V. | 24789 |
24 |
| Centre National de La Recherche Scientifique | 10465 |
19 |
| Hitachi High-Tech Corporation | 5343 |
19 |
| Panasonic Intellectual Property Management Co., Ltd. | 31598 |
18 |
| Altria Client Services LLC | 2204 |
18 |
| Saudi Arabian Oil Company | 13263 |
17 |
| Trinamix GmbH | 380 |
17 |
| 3m Innovative Properties Company | 17820 |
16 |
| Canon Inc. | 40165 |
16 |
| Seiko Epson Corporation | 19425 |
16 |
| Applied Materials, Inc. | 18759 |
16 |
| Yokogawa Electric Corporation | 1764 |
16 |
| Dräger Safety AG & Co. KGaA | 438 |
15 |
| Schlumberger Canada Limited | 7343 |
14 |
| Siemens AG | 24437 |
14 |
| Other owners | 3333 |