- 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: 405
10-year publication summary
|
41
|
52
|
26
|
33
|
12
|
11
|
12
|
7
|
28
|
13
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Merck Patent GmbH | 5850 |
52 |
| Idemitsu Kosan Co., Ltd. | 4152 |
32 |
| Sharp Display Technology Corporation | 830 |
25 |
| Semiconductor Energy Laboratory Co., Ltd. | 11358 |
21 |
| LG Chem, Ltd. | 17561 |
18 |
| Universal Display Corporation | 1879 |
18 |
| UDC Ireland Limited | 478 |
10 |
| Sumitomo Chemical Company, Limited | 9009 |
8 |
| Samsung Electronics Co., Ltd. | 144143 |
7 |
| Duk San Neolux Co., Ltd. | 639 |
7 |
| Samsung Display Co., Ltd. | 34230 |
6 |
| Signify Holding B.V. | 7421 |
6 |
| E. I. du Pont de Nemours and Company | 4118 |
5 |
| Samsung SDI Co., Ltd. | 8048 |
5 |
| Koninklijke Philips N.V. | 24557 |
4 |
| Nitto Denko Corporation | 8182 |
4 |
| Dai Nippon Printing Co., Ltd. | 4061 |
4 |
| Cambridge Display Technology Limited | 497 |
4 |
| Florida State University Research Foundation, Inc. | 729 |
4 |
| Nanoco Technologies Ltd. | 144 |
4 |
| Other owners | 161 |