Aerometers; acoustic alarms; sound alarms; alcoholmeters; wearable video display monitors; ammeters; anemometers; aerials; distance recording apparatus; audio interfaces; barometers; exposure meters for photographic devices; observation instruments, namely, electronic detectors for observing measuring the infrared spectrum, namely, infrared detectors; accelerometers; electronic black boxes for recording data; flashing safety lights; integrated circuit chips; magnetic encoders; encoded magneti...