- All sections
- H - Electricity
- H05B - Electric heating electric light sources not otherwise provided forcircuit arrangements for electric light sources, in general
- H05B 33/20 - Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
Patent holdings for IPC class H05B 33/20
Total number of patents in this class: 419
10-year publication summary
|
41
|
51
|
26
|
34
|
12
|
11
|
12
|
7
|
28
|
29
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Merck Patent GmbH | 5768 |
51 |
| Sharp Display Technology Corporation | 913 |
40 |
| Idemitsu Kosan Co., Ltd. | 4220 |
32 |
| Semiconductor Energy Laboratory Co., Ltd. | 11481 |
21 |
| LG Chem, Ltd. | 17656 |
18 |
| Universal Display Corporation | 1934 |
18 |
| UDC Ireland Limited | 472 |
10 |
| Sumitomo Chemical Company, Limited | 9047 |
8 |
| Duk San Neolux Co., Ltd. | 659 |
8 |
| Samsung Electronics Co., Ltd. | 147622 |
7 |
| Samsung Display Co., Ltd. | 35269 |
6 |
| Signify Holding B.V. | 7620 |
6 |
| E. I. du Pont de Nemours and Company | 4000 |
5 |
| Samsung SDI Co., Ltd. | 8589 |
5 |
| Florida State University Research Foundation, Inc. | 766 |
5 |
| Koninklijke Philips N.V. | 24865 |
4 |
| Nitto Denko Corporation | 8295 |
4 |
| Dai Nippon Printing Co., Ltd. | 4118 |
4 |
| Cambridge Display Technology Limited | 492 |
4 |
| Nanoco Technologies Ltd. | 144 |
4 |
| Other owners | 159 |