- 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: 33
10-year publication summary
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2
|
6
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6
|
0
|
1
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1
|
1
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2
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2
|
0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| MKS Instruments, Inc. | 698 |
11 |
| ULVAC, Inc. | 1448 |
5 |
| INFICON AG | 20 |
3 |
| Canon Anelva Corporation | 676 |
2 |
| INFICON GmbH | 59 |
2 |
| Vaclab Inc. | 5 |
2 |
| Xerox Corporation | 7503 |
1 |
| National Institute of Advanced Industrial Science and Technology | 3677 |
1 |
| Brooks Automation, Inc. | 191 |
1 |
| Keysight Technologies, Inc. | 1170 |
1 |
| Sumitomo Heavy Industries, Ltd. | 1670 |
1 |
| Chemring Sensors and Electronic Systems, Inc. | 39 |
1 |
| Vacuum Products Corporation | 1 |
1 |
| GSI Helmholtzzentrum für Schwerionenforschung GmbH | 83 |
1 |
| Other owners | 0 |