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    Item ID number:
    5421231
    Date:
    3 April 1945 (25 August 1923)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10993
    [Patent no. 23678, sale no. 34]. Title assigned by Library and Archives Canada. Patent granting Otto Zimmerman, Sam Zimmerman and EE Sparks Frl northwest 
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