- 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: 434
10-year publication summary
|
51
|
26
|
34
|
12
|
11
|
12
|
7
|
29
|
35
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sharp Display Technology Corporation | 1127 |
58 |
| Merck Patent GmbH | 5662 |
48 |
| Idemitsu Kosan Co., Ltd. | 4225 |
32 |
| Semiconductor Energy Laboratory Co., Ltd. | 11670 |
21 |
| LG Chem, Ltd. | 17813 |
18 |
| Universal Display Corporation | 2030 |
18 |
| UDC Ireland Limited | 513 |
13 |
| Sumitomo Chemical Company, Limited | 9044 |
8 |
| Duk San Neolux Co., Ltd. | 679 |
8 |
| Samsung Electronics Co., Ltd. | 153573 |
7 |
| Samsung Display Co., Ltd. | 37753 |
6 |
| Signify Holding B.V. | 7887 |
6 |
| E. I. du Pont de Nemours and Company | 3689 |
5 |
| Samsung SDI Co., Ltd. | 9793 |
5 |
| Florida State University Research Foundation, Inc. | 818 |
5 |
| Koninklijke Philips N.V. | 25570 |
4 |
| Nitto Denko Corporation | 8466 |
4 |
| Dai Nippon Printing Co., Ltd. | 4208 |
4 |
| Cambridge Display Technology Limited | 481 |
4 |
| Nanoco Technologies Ltd. | 144 |
4 |
| Other owners | 156 |