Resource Type
6 Matching Results
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Drill Bit for Wells
Patent for drill bit for drilling wells.
Date:
January 2, 1917
Creator:
Martin, Robert D.
System:
The Portal to Texas History
Electric Circuit Breaker
Patent for circuit control apparatus that automatically opens the circuit when conditions are abnormal.
Date:
January 30, 1917
Creator:
Nielssen, Steffen F.
System:
The Portal to Texas History
Locking Mechanism
Patent for locking mechanism, particulalry used in locking liquid dispensing machines.
Date:
January 30, 1917
Creator:
Bradley, Richard C.
System:
The Portal to Texas History
Oil Thief
Patent for Oil Thief
Date:
January 2, 1917
Creator:
Kaul, Walter H.
System:
The Portal to Texas History
Pumping Mechanism
Patent for pumping mechanism.
Date:
January 9, 1917
Creator:
Layne, Mahlon E.
System:
The Portal to Texas History
Soldering Device
Patent for improved automatic soldering device.
Date:
January 30, 1917
Creator:
Bradley, Richard C.
System:
The Portal to Texas History