- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 61/44 - Devices characterised by the luminescent material
Patent holdings for IPC class H01J 61/44
Total number of patents in this class: 158
10-year publication summary
|
8
|
4
|
6
|
8
|
3
|
1
|
9
|
1
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| General Electric Company | 13856 |
14 |
| Koninklijke Philips Electronics N.V. | 9149 |
14 |
| Sumitomo Chemical Company, Limited | 9092 |
9 |
| Philips Intellectual Property & Standards GmbH | 1860 |
9 |
| OSRAM GmbH | 2379 |
8 |
| Savant Technologies, LLC | 352 |
5 |
| Merck Patent GmbH | 5764 |
4 |
| Panasonic Corporation | 20018 |
4 |
| Xylem Europe GmbH | 215 |
4 |
| Koninklijke Philips N.V. | 24957 |
3 |
| Nichia Corporation | 3753 |
3 |
| LEDVANCE GmbH | 583 |
3 |
| Rhodia Operations | 1585 |
3 |
| Ushio Denki Kabushiki Kaisha | 1194 |
3 |
| Signify Holding B.V. | 7646 |
3 |
| Shikoh Tech Co., Ltd | 6 |
3 |
| FUJIFILM Corporation | 29713 |
2 |
| Panasonic Intellectual Property Management Co., Ltd. | 32095 |
2 |
| Mitsubishi Chemical Corporation | 4585 |
2 |
| Hamamatsu Photonics K.K. | 4462 |
2 |
| Other owners | 58 |