- All sections
- G - Physics
- G01L - Measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
- G01L 21/04 - Vacuum gauges having a compression chamber in which gas, whose pressure is to be measured, is compressed wherein the chamber is closed by liquid; Vacuum gauges of the McLeod type
Patent holdings for IPC class G01L 21/04
Total number of patents in this class: 8
10-year publication summary
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0
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0
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1
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0
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0
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0
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0
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0
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0
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1
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Matsushita Electric Industrial Co., Ltd. | 4724 |
2 |
| Qualcomm Incorporated | 76576 |
1 |
| NEC Corporation | 32703 |
1 |
| Smule, Inc. | 158 |
1 |
| Cerence Inc. | 326 |
1 |
| Cerence Operating Company | 447 |
1 |
| Kandao Technology Co. Ltd | 36 |
1 |
| Other owners | 0 |