- All sections
- H - Electricity
- H05B - Electric heating electric light sources not otherwise provided forcircuit arrangements for electric light sources, in general
- H05B 33/22 - Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
Patent holdings for IPC class H05B 33/22
Total number of patents in this class: 1901
10-year publication summary
|
106
|
101
|
121
|
168
|
102
|
102
|
181
|
113
|
47
|
27
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sharp Kabushiki Kaisha | 18693 |
224 |
| Semiconductor Energy Laboratory Co., Ltd. | 11471 |
201 |
| Panasonic Corporation | 20036 |
123 |
| Pioneer Corporation | 4266 |
113 |
| Toray Industries, Inc. | 7000 |
75 |
| FUJIFILM Corporation | 29696 |
69 |
| Japan Display Inc. | 6995 |
68 |
| Sharp Display Technology Corporation | 920 |
58 |
| Sumitomo Chemical Company, Limited | 9079 |
56 |
| Sony Corporation | 30921 |
49 |
| Joled Inc. | 211 |
47 |
| Sony Semiconductor Solutions Corporation | 10690 |
47 |
| Showa Denko K.K. | 2196 |
45 |
| Tohoku Pioneer Corporation | 475 |
44 |
| Samsung Display Co., Ltd. | 35374 |
35 |
| Asahi Glass Company, Limited | 2760 |
34 |
| Konica Minolta, Inc. | 8801 |
31 |
| LG Chem, Ltd. | 17676 |
25 |
| Mitsubishi Chemical Corporation | 4579 |
22 |
| Sony Group Corporation | 14275 |
21 |
| Other owners | 514 |