- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F22B - Methods of steam generation; steam boilers
- F22B 31/08 - Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
Patent holdings for IPC class F22B 31/08
Total number of patents in this class: 51
10-year publication summary
3
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6
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2
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3
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5
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2
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2
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7
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2
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0
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