Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; lasers, not for medical purposes; lighting control apparatus; light emitting diodes (LEDs) also organic light emitting diodes (LEDs); laser diodes, especially power laser diodes, semi-conductor power laser diodes, also for material processing; light conducting filaments, optical couplers, optical sensors, light barriers in the nature of sensors that detect objects by using a...