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All Patents in class 75/557
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
16,082Nov. 11, 1856H. BessemerImprovement in the manufacture of iron and steelfoundryman
482,001Sep. 06, 1892B. BrazelleProcess of and apparatus for purifying, refining, and carburizing metals
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