[ Acoustic couplers; Aerials; Amplifiers; Antennas for wireless communications apparatus; Decorative magnets; Decorative refrigerator magnets; Devices for wireless radio transmission; Electric coils; Electric conductors; Electric resistances; Electronic proximity sensors and switches; Erasing magnets; Holders for electric coils; Light switches; Light systems comprising light sensors and switches; ] Magnets [ ; Magnets arranged for converting human effort into mechanical power; Magnets for ind...