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    Item ID number:
    5420776
    Date:
    14 March 1940 (26 March 1913)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10990
    [Patent number 23143, sale numbers 406 and 407]. Title assigned by Library and Archives Canada. Patent granting Peter W. Johnson, Charles Konkin and Stanley 
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