- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01B - Machines or engines, in general or of positive-displacement type, e.g. steam engines
- F01B 31/20 - Draining of cylinders
Patent holdings for IPC class F01B 31/20
Total number of patents in this class: 3
10-year publication summary
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Caterpillar Energy Solutions GmbH | 141 |
2 |
| Actuant Corporation | 86 |
1 |
| Other owners | 0 |