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    [Patent number 19416, sale numbers 223 and 224]

    Archives / Collections and Fonds
    Item (linked)
    Textual material
    Item ID number:
    5417603
    Date:
    28 December 1920 (14 June 1911)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10971
    [Patent number 19416, sale numbers 223 and 224]. Title assigned by Library and Archives Canada. Patent granting Lawrence H. Irwin and Dr
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