- 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: 398
10-year publication summary
|
41
|
52
|
26
|
33
|
12
|
11
|
12
|
7
|
28
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Merck Patent GmbH | 5842 |
53 |
| Idemitsu Kosan Co., Ltd. | 4103 |
32 |
| Semiconductor Energy Laboratory Co., Ltd. | 11101 |
20 |
| LG Chem, Ltd. | 17639 |
18 |
| Universal Display Corporation | 1815 |
18 |
| Sharp Display Technology Corporation | 698 |
18 |
| UDC Ireland Limited | 490 |
10 |
| Sumitomo Chemical Company, Limited | 8988 |
8 |
| Samsung Electronics Co., Ltd. | 139001 |
7 |
| Duk San Neolux Co., Ltd. | 592 |
7 |
| Samsung Display Co., Ltd. | 32798 |
6 |
| E. I. du Pont de Nemours and Company | 4249 |
5 |
| Samsung SDI Co., Ltd. | 7347 |
5 |
| Signify Holding B.V. | 7237 |
5 |
| Koninklijke Philips N.V. | 23999 |
4 |
| Nitto Denko Corporation | 8089 |
4 |
| Dai Nippon Printing Co., Ltd. | 3976 |
4 |
| Cambridge Display Technology Limited | 503 |
4 |
| Florida State University Research Foundation, Inc. | 707 |
4 |
| Nanoco Technologies Ltd. | 144 |
4 |
| Other owners | 162 |