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    Item ID number:
    5419231
    Date:
    1 March 1929 (2 May 1928)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10983
    [Patent no. 21517, sale no. 754]. Title assigned by Library and Archives Canada. Patent granting Ronald Ernest Gunn and George W
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