- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01L - Cyclically operating valves for machines or engines
- F01L 21/00 - Use of working pistons or piston-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines
Patent holdings for IPC class F01L 21/00
Total number of patents in this class: 4
10-year publication summary
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0
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0
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2
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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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1
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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
|
|---|---|---|
| Schlumberger Technology Corporation | 9690 |
1 |
| Dynaset Oy | 8 |
1 |
| Liftwave, Inc., DBA Rise Robotics | 26 |
1 |
| Aquarius Engines (A.M.) Ltd. | 35 |
1 |
| Other owners | 0 |