- All sections
- G - Physics
- G01L - Measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
- G01L 21/32 - Vacuum gauges by making use of ionisation effects using electric discharge tubes with thermionic cathodes
Patent holdings for IPC class G01L 21/32
Total number of patents in this class: 31
10-year publication summary
|
6
|
6
|
0
|
1
|
1
|
1
|
2
|
2
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| MKS Instruments, Inc. | 652 |
11 |
| ULVAC, Inc. | 1379 |
5 |
| INFICON AG | 25 |
3 |
| Canon Anelva Corporation | 686 |
2 |
| Xerox Corporation | 7002 |
1 |
| National Institute of Advanced Industrial Science and Technology | 3802 |
1 |
| Brooks Automation, Inc. | 159 |
1 |
| INFICON GmbH | 42 |
1 |
| Keysight Technologies, Inc. | 1196 |
1 |
| Sumitomo Heavy Industries, Ltd. | 1929 |
1 |
| Vaclab Inc. | 4 |
1 |
| Chemring Sensors and Electronic Systems, Inc. | 20 |
1 |
| Q'z Corporation | 6 |
1 |
| GSI Helmholtzzentrum für Schwerionenforschung GmbH | 86 |
1 |
| Other owners | 0 |