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Primary view of Casing-Pulling Apparatus.
Wilson, John Hart
November 29, 1921
Primary view of Boring and Threading Tool.
Wells, Daniel Doolittle
June 21, 1921
Primary view of Calk Attachment For Horseshoes
Douglas, John Davies
March 29, 1921
Primary view of Valve Structure
Anderson, Jalmer
August 30, 1921
Primary view of Water-Motor.
Brady, Enoch J.
August 16, 1921
Primary view of Automobile-Signal.
Squier, William Ernest
November 15, 1921
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