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    Item ID number:
    5421443
    Date:
    6 January 1947 (22 November 1946)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10994
    [Patent no. 23950, sale no. 597]. Gibson (Ont.) Title assigned by Library and Archives Canada. Patent granting Flora Bernice Cooper and Thomas H
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