[ Voltage regulators for regulating electric current; ] telecommunication and computer apparatus and components thereof, namely, antenna amplifiers, [ mast amplifiers, domestic amplifiers, launch amplifiers, programmable headend amplifiers, channel amplifiers, line amplifiers, ] domestic power supply units, [ antenna masts, towers for antennas; electrical surge arrestors; electric sockets specially adapted for use as antenna jacks; antenna combiners, namely, electronic combiners for connectin...