- All sections
- G - Physics
- G01L - Measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
- G01L 21/34 - Vacuum gauges by making use of ionisation effects using electric discharge tubes with cold cathodes
Patent holdings for IPC class G01L 21/34
Total number of patents in this class: 58
10-year publication summary
|
7
|
5
|
4
|
3
|
2
|
8
|
6
|
1
|
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 |
13 |
| Canon Anelva Corporation | 686 |
10 |
| INFICON AG | 25 |
8 |
| INFICON GmbH | 42 |
3 |
| Nanotech Analysis S.r.l.s. | 8 |
3 |
| Hon Hai Precision Industry Co., Ltd. | 4034 |
2 |
| Tsinghua University | 5931 |
2 |
| Brooks Automation, Inc. | 159 |
2 |
| Sumitomo (SHI) Cryogenics of America, Inc. | 78 |
2 |
| INFICON Holding AG | 180 |
2 |
| Massachusetts Institute of Technology | 10055 |
1 |
| National Institute of Advanced Industrial Science and Technology | 3802 |
1 |
| Abengoa Solar New Technologies, S.A. | 155 |
1 |
| Auckland UniServices Limited | 495 |
1 |
| Diavac Limited | 4 |
1 |
| Edwards Limited | 787 |
1 |
| Keysight Technologies, Inc. | 1196 |
1 |
| Saint-Gobain Glass France | 3756 |
1 |
| SRI International | 1012 |
1 |
| Chemring Sensors and Electronic Systems, Inc. | 20 |
1 |
| Other owners | 1 |