- 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: 240
10-year publication summary
|
19
|
29
|
27
|
22
|
11
|
22
|
8
|
15
|
4
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Corning Incorporated | 10538 |
19 |
| Saint-Gobain Glass France | 3243 |
18 |
| Asahi Glass Company, Limited | 2597 |
9 |
| Glasstech, Inc. | 119 |
9 |
| Nippon Electric Glass Co., Ltd. | 2567 |
9 |
| Sumitomo Chemical Company, Limited | 8965 |
8 |
| PolyPlus Battery Company | 94 |
6 |
| ISRA VISION GmbH | 56 |
6 |
| Nitto Denko Corporation | 8589 |
5 |
| Guardian Glass, LLC | 563 |
5 |
| LG Chem, Ltd. | 17970 |
4 |
| Grenzebach Maschinenbau GmbH | 173 |
4 |
| Sumitomo Electric Industries, Ltd. | 16368 |
3 |
| Shenzhen China Star Optoelectronics Technology Co., Ltd. | 8470 |
3 |
| DONGWOO FINE-CHEM Co., Ltd. | 1445 |
3 |
| SCHOTT AG | 1748 |
3 |
| Emage Vision Pte. Ltd | 20 |
3 |
| General Electric Company | 13982 |
2 |
| Samsung Display Co., Ltd. | 39087 |
2 |
| Hitachi, Ltd. | 16206 |
2 |
| Other owners | 117 |