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    Archives / Collections and Fonds
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    Textual material
    Item ID number:
    1493287
    Date:
    1936-1939
    Source:
    Government
    Reference:
    RG15-D-II-1, Volume number: 1172, Microfilm reel number: T-15538, File number: 5612160
    WILLIAM JOHN CAMPBELL CERTIFIED COPIES OF PATENTS RE W1/2 27-12-23W1 (RULING 1594). CAMPBELL WILLIAM JOHN CERTIFIED COPIES OF PATENTS
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