- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 41/04 - Discharge tubes and means integral therewith for measuring gas pressure with ionisation by means of thermionic cathodes
Patent holdings for IPC class H01J 41/04
Total number of patents in this class: 23
10-year publication summary
|
1
|
1
|
3
|
0
|
2
|
4
|
0
|
1
|
1
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| MKS Instruments, Inc. | 698 |
4 |
| ULVAC, Inc. | 1448 |
4 |
| Shine Technologies, LLC | 92 |
4 |
| Brooks Automation, Inc. | 191 |
3 |
| Canon Anelva Corporation | 676 |
1 |
| Enertechnix, Inc. | 6 |
1 |
| INFICON GmbH | 59 |
1 |
| Keysight Technologies, Inc. | 1170 |
1 |
| SRI International | 974 |
1 |
| Thermo Fisher Scientific (Bremen) GmbH | 496 |
1 |
| Vaclab Inc. | 5 |
1 |
| Chemring Sensors and Electronic Systems, Inc. | 39 |
1 |
| Other owners | 0 |