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    [Patent no. 21859, sale no. 766]

    Archives / Collections and Fonds
    Item (linked)
    Textual material
    Item ID number:
    5419565
    Date:
    26 February 1930 (2 May 1928)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10984
    [Patent no. 21859, sale no. 766]. Title assigned by Library and Archives Canada. Patent granting John Klassen and Fred Doroshenko N 1/2 in Perpendicular 
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