US2014102809A1
|
|
Anti-balling coating on drill bits and downhole tools
|
US2013214769A1
|
|
Use of Capacitance And Eddy Currents to Analyze Polycrystalline Diamond
|
US2010319997A1
|
|
Whipstock attachment to a fixed cutter drilling or milling bit
|
US2632655A
|
|
Wheeled attachment for transporting boats
|
US2244625A
|
|
Opener for crown sealed containers
|
US923535A
|
|
Jump-spark plug for explosion-engines.
|
US1042561A
|
|
Speed-recording device.
|
US653093A
|
|
Apparatus for supplying currents for predetermined voltage from main lines of higher voltage.
|