Scientific, research, navigation, photographic, optical, signaling, measuring, checking as in supervision, life-saving apparatus and instruments, namely, telephones, punch clocks, time recording devices, namely, time clocks, weighing equipment, namely, scales and balances, graduated rulers, electronic pocket translators, neon signs, electronic notice boards, transparency projection apparatus, kilometer recorders in the nature of odometers for vehicles, telescopes, mechanisms for counter opera...