Amplifiers for use with servo motors; Automatic valves for controlling the flow of oil in pipelines; Carrying cases, holders, protective cases and stands featuring power supply connectors, adaptors, speakers and battery charging devices, specially adapted for use with handheld digital electronic devices, namely, cell phones, MP3 players and personal digital assistants; DC/AC power converters; Electrical transducers; Electrical wiring devices in the nature of sockets, receptacles, switches and...