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Primary view of Electric Circuit Breaker
Nielssen, Steffen F.
January 30, 1917
Primary view of Locking Mechanism
Bradley, Richard C.
January 30, 1917
Primary view of Drill Bit for Wells
Martin, Robert D.
January 2, 1917
Primary view of Oil Thief
Kaul, Walter H.
January 2, 1917
Primary view of Soldering Device
Bradley, Richard C.
January 30, 1917
Primary view of Pumping Mechanism
Layne, Mahlon E.
January 9, 1917
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