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in subjects: "Science and Technology - Tools"  
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Primary view of Tool for Drilling Wells.
McLane, Hiram H.
July 16, 1889
Primary view of Hat-Fastener.
Miller, Emma T.
September 16, 1913
Primary view of Telephone-Transmitter
Crawford, Witsius A.
January 16, 1883
Primary view of Flexible Joint
Mooney, Thomas H.
November 16, 1915
Primary view of Pressure-Screw.
Menger, Edward W.
August 16, 1921
Primary view of Air-Compressing Apparatus.
Gebhardt, William Charles
March 16, 1915
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