Plugboards; Automatic valves; Controlled volume pumps; Electric current control devices; Electric valve actuators; Electrical and electronic connectors; Electrical header connectors; Electrical plugs and sockets; Electrical wiring devices in the nature of sockets, receptacles, switches, controllers incorporating tactile instructions and/or warnings for use by the blind; Electronic circuits, namely, flip-flops; Fuel cell electrodes; Portable power chargers; Power controllers