- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 21/22 - Tubes with more than one discharge path; Multiple tubes, e.g. double diode or triode-hexode with movable electrode or electrodes
Patent holdings for IPC class H01J 21/22
Total number of patents in this class: 8
10-year publication summary
|
0
|
0
|
0
|
1
|
2
|
1
|
0
|
0
|
0
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Noritake Co., Limited | 224 |
2 |
| Noritake Itron Corporation | 27 |
2 |
| Vomar Tech, Inc. | 4 |
2 |
| DB HiTek Co., Ltd. | 359 |
1 |
| Aureon Energy Ltd. | 15 |
1 |
| Other owners | 0 |