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    Item ID number:
    5416894
    Date:
    21 December 1918 (12 May 1910)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10967
    [Patent number 18381, sale numbers 191, 192 and 193]. Title assigned by Library and Archives Canada. Patent granting Edmund Cumming Senkler and John JG 
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