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ORIGINAL PRINTED PATENT APPLICATION NUMBER 21,419 FOR METHOD OF CARBURIZING IRON, IRON ALLOYS, AND MILD STEEL, AND ARTICLES THEREOF. (19090..(THE INVENTOR LIVED AT 89, SHOOTERS HILL ROAD, BLACKHEATH).
🇺🇸 United States
ORIGINAL PRINTED PATENT APPLICATION NUMBER 21,419 FOR METHO…
By: William Richard. (inventor). Hodgkinson
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