F22D 1/26
Feed-water heaters, i.e. economisers or like preheaters: with means, other than tubes
Official title: with means, other than tubes, to separate water and heating medium, e.g. bulk heaters without internal flues or tubes, jacketted smoke-boxes or flue or flues
F22D1/26 (Feed-water heaters, i.e. economisers or like preheaters: with means, other than tubes) appears on 0 US grants and 0 published applications in this corpus.
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