- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F21V - Functional features or details of lighting devices or systems thereof; structural combinations of lighting devices with other articles, not otherwise provided for
- F21V 9/20 - Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
Patent holdings for IPC class F21V 9/20
Total number of patents in this class: 71
10-year publication summary
|
1
|
0
|
1
|
4
|
16
|
14
|
15
|
11
|
8
|
7
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
6 |
| Signify Holding B.V. | 6837 |
6 |
| Sony Group Corporation | 10730 |
5 |
| Sony Corporation | 32931 |
4 |
| ROBE Lighting s.r.o. | 109 |
4 |
| Ichikoh Industries, Ltd. | 303 |
3 |
| Olympus Corporation | 13667 |
2 |
| Kyocera Corporation | 12735 |
2 |
| Dai Nippon Printing Co., Ltd. | 3891 |
2 |
| Nichia Corporation | 3394 |
2 |
| Appotronics Corporation Limited | 1111 |
2 |
| Koito Manufacturing Co., Ltd. | 1991 |
2 |
| Lumileds LLC | 1827 |
2 |
| Shoei Chemical Inc. | 320 |
2 |
| DWP Energy Solutions, LLC | 4 |
2 |
| Sharp Kabushiki Kaisha | 18957 |
2 |
| 3m Innovative Properties Company | 18406 |
1 |
| LG Display Co., Ltd. | 11907 |
1 |
| Seiko Epson Corporation | 18724 |
1 |
| Mitsubishi Electric Corporation | 43934 |
1 |
| Other owners | 19 |