- All sections
- H - Electricity
- H05B - Electric heating; electric light sources not otherwise provided for; circuit 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: 390
10-year publication summary
|
31
|
41
|
52
|
26
|
33
|
12
|
11
|
12
|
6
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Merck Patent GmbH | 5909 |
54 |
| Idemitsu Kosan Co., Ltd. | 3995 |
32 |
| Semiconductor Energy Laboratory Co., Ltd. | 10902 |
20 |
| LG Chem, Ltd. | 17205 |
18 |
| Universal Display Corporation | 1678 |
18 |
| UDC Ireland Limited | 496 |
9 |
| Sumitomo Chemical Company, Limited | 8808 |
8 |
| Samsung Electronics Co., Ltd. | 131630 |
7 |
| Duk San Neolux Co., Ltd. | 512 |
7 |
| Samsung Display Co., Ltd. | 30585 |
6 |
| Nippon Steel Chemical & Material Co., Ltd. | 571 |
6 |
| Sharp Display Technology Corporation | 390 |
6 |
| E. I. du Pont de Nemours and Company | 4345 |
5 |
| Samsung SDI Co., Ltd. | 6671 |
5 |
| Signify Holding B.V. | 6837 |
5 |
| Koninklijke Philips N.V. | 22975 |
4 |
| Nitto Denko Corporation | 7879 |
4 |
| Dai Nippon Printing Co., Ltd. | 3891 |
4 |
| Cambridge Display Technology Limited | 513 |
4 |
| Nanoco Technologies Ltd. | 148 |
4 |
| Other owners | 164 |