Amplifiers for use with servo motors; Audio-receivers and video-receivers; Circulators in the nature of electronic components; Computer memory modules; Electric locks; Electronic control systems for engines; LED position sensors; Pneumatic and hydraulic directional control valves for use in automated production machinery; Radio-frequency receivers; Radio-frequency transmitters; Radio antennas; Radio relay cables; Radio sets; Telegraphic transmitting apparatus; Touch screens; Transmitters of e...