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    Item ID number:
    5419564
    Date:
    26 February 1930 (15 April 1929)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10984
    [Patent no. 21858, sale no. 874]. Title assigned by Library and Archives Canada. Patent granting Henry F. Bickle, Preston Ware Hall and William James Smith 
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