- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/896 - Optical defects in or on transparent materials, e.g. distortion, surface flaws
Patent holdings for IPC class G01N 21/896
Total number of patents in this class: 238
10-year publication summary
|
18
|
18
|
27
|
26
|
20
|
11
|
20
|
8
|
15
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Corning Incorporated | 10283 |
19 |
| Saint-Gobain Glass France | 3251 |
18 |
| Sumitomo Chemical Company, Limited | 9044 |
9 |
| Asahi Glass Company, Limited | 2769 |
9 |
| Nippon Electric Glass Co., Ltd. | 2465 |
9 |
| Glasstech, Inc. | 122 |
8 |
| Nitto Denko Corporation | 8271 |
7 |
| PolyPlus Battery Company | 98 |
6 |
| Guardian Glass, LLC | 572 |
5 |
| LG Chem, Ltd. | 17636 |
4 |
| Grenzebach Maschinenbau GmbH | 174 |
4 |
| Sumitomo Electric Industries, Ltd. | 15557 |
3 |
| Shenzhen China Star Optoelectronics Technology Co., Ltd. | 8476 |
3 |
| Corning Precision Materials Co., Ltd. | 210 |
3 |
| DONGWOO FINE-CHEM Co., Ltd. | 1357 |
3 |
| SCHOTT AG | 1712 |
3 |
| Emage Vision Pte. Ltd | 18 |
3 |
| ISRA VISION GmbH | 31 |
3 |
| General Electric Company | 13807 |
2 |
| Samsung Display Co., Ltd. | 35017 |
2 |
| Other owners | 115 |