- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
Patent holdings for IPC class G01N 21/892
Total number of patents in this class: 444
10-year publication summary
|
38
|
29
|
34
|
47
|
39
|
33
|
36
|
37
|
37
|
19
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Chemical Company, Limited | 9009 |
38 |
| JFE Steel Corporation | 6767 |
23 |
| FUJIFILM Corporation | 29228 |
19 |
| Nitto Denko Corporation | 8182 |
15 |
| CKD Corporation | 451 |
12 |
| Nippon Steel Corporation | 6166 |
12 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
11 |
| Toray Industries, Inc. | 6891 |
10 |
| Yoshino Gypsum Co., Ltd. | 250 |
8 |
| Mitsubishi Electric Corporation | 45811 |
7 |
| Sumitomo Electric Industries, Ltd. | 15344 |
6 |
| Konica Minolta, Inc. | 8668 |
6 |
| MainTech Co., Ltd. | 65 |
6 |
| Omron Corporation | 7236 |
5 |
| Toray Engineering Co., Ltd. | 473 |
5 |
| Hitachi, Ltd. | 15434 |
4 |
| Ricoh Company, Ltd. | 13208 |
4 |
| Glory Ltd. | 1199 |
4 |
| Meinan Machinery Works, Inc. | 64 |
4 |
| Mitsubishi Heavy Industries Machinery Systems, Ltd. | 440 |
4 |
| Other owners | 241 |