- All sections
- H - Electricity
- H05B - Electric heating; electric light sources not otherwise provided for; circuit 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: 1921
10-year publication summary
112
|
106
|
101
|
121
|
169
|
102
|
100
|
180
|
113
|
17
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Sharp Kabushiki Kaisha | 18957 |
227 |
Semiconductor Energy Laboratory Co., Ltd. | 10902 |
205 |
Panasonic Corporation | 20786 |
123 |
Pioneer Corporation | 4843 |
115 |
Toray Industries, Inc. | 6652 |
74 |
FUJIFILM Corporation | 27102 |
72 |
Japan Display Inc. | 6202 |
69 |
Sumitomo Chemical Company, Limited | 8808 |
58 |
Sony Corporation | 32931 |
48 |
Joled Inc. | 232 |
48 |
Sony Semiconductor Solutions Corporation | 8770 |
47 |
Showa Denko K.K. | 2539 |
45 |
Tohoku Pioneer Corporation | 477 |
42 |
Samsung Display Co., Ltd. | 30585 |
34 |
Asahi Glass Company, Limited | 2985 |
34 |
Konica Minolta, Inc. | 8349 |
31 |
LG Chem, Ltd. | 17205 |
25 |
Sharp Display Technology Corporation | 390 |
25 |
Mitsubishi Chemical Corporation | 4313 |
23 |
Sony Group Corporation | 10730 |
20 |
Other owners | 556 |