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    Item ID number:
    5417860
    Date:
    28 December 1921 (2 September 1918)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10973
    [Patent no. 19750, sale no. 179]. Title assigned by Library and Archives Canada. Patent granting Emma M. Olson and Colin Bruce Campbell N
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