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  1. 1
    No digital object
    Archives / Collections and Fonds
    Item (linked)
    Textual material
    Item ID number:
    5420375
    Date:
    9 February 1935 (4 June 1925)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10988
    [Patent no. 22711, sale no. 108]. Title assigned by Library and Archives Canada. Patent granting Peter O. Barisoff and Ahafia Chursinoff Ptn. of Frl
  2. 2
    No digital object
    Archives / Collections and Fonds
    Item (linked)
    Textual material
    Item ID number:
    5421129
    Date:
    31 October 1944 (21 December 1934)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10992
    [Patent no. 23561, sale no. 129]. Title assigned by Library and Archives Canada. Patent granting Ahafia Ivanovna Chursinoff Ptn. of N 1/2, 
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