Vehicle destination signs in this class; aircraft air valves

Scientific and electrical apparatus and instruments, optical, weighing, measuring, signalling and checking instruments, communication apparatus and instruments, telementry system, command decoders, signal displays, sequencer timers, spectrum analyzers; audio equipment including microphones, loudspeakers and speaker systems, mixers, amplifiers, signal processors, monitors, equalizers, filters, analyzers, telephone head sets and hand sets; electrical power apparatus including power supplies not being electric current generators or electric motors, power converters, power inverters, frequency changers, battery chargers, battery systems, and power, voltage and current regulators; fuel contamination sensors, carrier and wire communication and control systems, and industrial control systems; ground monitors, and dial couplers; temperature controllers and indicators; measuring and recording devices; digital printers, thermal print heads, signal conditioners, thermocouples, eddy current flow detectors; pressure and position transducers, accelerometers, and vibration measurement system; connectors and cable assemblies; flow measurement systems; pressure switches; image processing computers and computer systems; information display systems.

Lighting fixtures in this class