- 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: 429
10-year publication summary
|
51
|
26
|
34
|
12
|
11
|
12
|
7
|
28
|
35
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Merck Patent GmbH | 5724 |
51 |
| Sharp Display Technology Corporation | 1072 |
51 |
| Idemitsu Kosan Co., Ltd. | 4231 |
32 |
| Semiconductor Energy Laboratory Co., Ltd. | 11608 |
21 |
| LG Chem, Ltd. | 17737 |
18 |
| Universal Display Corporation | 2003 |
18 |
| UDC Ireland Limited | 463 |
10 |
| Sumitomo Chemical Company, Limited | 9053 |
8 |
| Duk San Neolux Co., Ltd. | 675 |
8 |
| Samsung Electronics Co., Ltd. | 151485 |
7 |
| Samsung Display Co., Ltd. | 37252 |
6 |
| Signify Holding B.V. | 7785 |
6 |
| E. I. du Pont de Nemours and Company | 3767 |
5 |
| Samsung SDI Co., Ltd. | 9263 |
5 |
| Florida State University Research Foundation, Inc. | 801 |
5 |
| Koninklijke Philips N.V. | 25365 |
4 |
| Nitto Denko Corporation | 8410 |
4 |
| Dai Nippon Printing Co., Ltd. | 4169 |
4 |
| Cambridge Display Technology Limited | 487 |
4 |
| Nanoco Technologies Ltd. | 144 |
4 |
| Other owners | 158 |