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    [Patent no. 21932, sale no. 47]

    Archives / Collections and Fonds
    Item (linked)
    Textual material
    Item ID number:
    5419637
    Date:
    5 July 1930 (20 April 1925)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10985
    [Patent no. 21932, sale no. 47]. Title assigned by Library and Archives Canada. Patent granting Arthur W. Mattern and Sanford E
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