ZEEFAX
[ (Based on Use)(Based on 44(e)) ] Electrical and electronic power control systems for use in connection with drilling apparatus and rigs for oil and gas exploration and production, namely, AC control modules, DC control modules, digital DC modules, digital frequency control modules, user consoles for use with control modules, power supply units, drilling power control systems, silicon controlled rectifiers, drilling silicon controlled rectifier systems, field regulator modules, firing pulse ...
Registered · March 6, 2012 · 85561940 ·