F22B 7/14

Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed

Official title: with both auxiliary water tubes and auxiliary fire tubes

F22B7/14 (Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed) appears on 2 US grants and 1 published applications in this corpus.

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2
Published applications
1
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2
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15 Jun 2021

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