Measuring, signaling, and recording apparatus: thermometers (non-medical), barometers, ammeters, voltmeters, humidistats, test equipment, telescopes, periscopes, compasses, vehicle indicators; Aadio-visual equipment: cameras, photo cameras, televisions, video recorders/players, CD/DVD recorders/players, MP3 players, computers, desktop/tablet computers, wearable tech (smartwatches, fitness bands, head-mounted devices), microphones, speakers, headphones; communication and duplication devices, c...