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  1. 1
    No digital object

    [Patent no. 20908, sale no. 751]

    Archives / Collections and Fonds
    Item (linked)
    Textual material
    Item ID number:
    5418685
    Date:
    6 April 1927 (12 June 1923)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10978
    [Patent no. 20908, sale no. 751]. Title assigned by Library and Archives Canada. Patent granting Charles Richmond Mitchell West 1/2, Section 32, 
  2. 2
    No digital object

    [Patent no. 21493, sale numbers 237-240]

    Archives / Collections and Fonds
    Item (linked)
    Textual material
    Item ID number:
    5419208
    Date:
    14 February 1929 (14 June 1911)
    Source:
    Government
    Reference:
    R216, RG10-D-11-a, Volume number: 10982
    [Patent no. 21493, sale numbers 237-240]. Title assigned by Library and Archives Canada. Patent granting Arthur M. Grace and Charles Richmond Mitchell 
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