Antennas; Cabinets for loudspeakers; Coaxial cables; Computer peripheral devices; Condensers; Electric buzzers; Electric cables; Electric cables, wires, conductors and connection fittings therefor; Electric connections; Electric door bells; Electric light switches; Electric resistances; Electric switches; Electric wires; Electrical inductors; Electrical plugs and sockets; Electronic apparatus for the remote control of industrial operations; Low pass inductor filter used in high power electrical applications; Magnetic cards; Magnetic compasses; Magnetic cores; Magnetic encoders; Magnetic gyrocompasses; Magnetic head cleaners; Magnetic pens; Magnetic powders; Megaphones; Microphones; Printed circuits; Receivers for telephone; Semi-conductors; Semiconductor devices; Ultrasonic sensors; Vacuum tubes for radios; Voltage monitor modules; Voltage regulators; Voltage stabilizing power supply