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    Item ID number:
    5417477
    Date:
    13 September 1920 (9 August 1920)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10970
    [Patent no. 19235, sale no. 75]. Title assigned by Library and Archives Canada. Patent granting Ditlew M. Frederikson Frl. northeast 1/4, 
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