- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 17/56 - Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes for preventing and then permitting ignition, but thereafter having no control
Patent holdings for IPC class H01J 17/56
Total number of patents in this class: 0
10-year publication summary
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Other owners | 0 |