- All sections
- B - Performing operationstransporting
- B63H - Marine propulsion or steering
- B63H 21/04 - Use of propulsion power plant or units on vessels the vessels being steam-driven relating to positive-displacement steam engines
Patent holdings for IPC class B63H 21/04
Total number of patents in this class: 0
10-year publication summary
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
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All patents
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This class
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| Other owners | 0 |