Semiconductor device known as unipolar power transistron
ES141177A1
Improvements in continuous furnaces for glass melting.
ES135876A1
Improvements in devices for controlling the polarization voltage of the grids of the ionized steam rectifiers.
ES130851A1
A new system that allows the automatic coupling of DC machines.
ES129065A1
Electrical equipment, applicable to electric traction vehicles, which allows the automatic start-up of the motors and ensures braking by recovering energy from the line.
ES123194A1
Electrical equipment applicable to electric traction vehicles that allows the automatic start-up of motors and ensures braking by energy recovery on the line.
ES110325A1
An improved system for the control of electric motors of traction to direct current.
ES109896A1
An electric notch notch system for combiners and other applications.
ES102411A1
Pilot cable for differential protection.
BE650550A
Semiconductor device for rectifying and limiting strong electric currents
