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All Patents in class 110/309
Patents 1 - 3 of 3
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
95,849Oct. 12, 1869B.F. SturtevantHot Air Furnace
  713,012Nov. 04, 1902G.B. MitchellCombination Blast Furnace
  782,875Feb. 21, 1905H. PriceForge
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