Safety light curtains; telephones; telephones incorporating intercommunication systems; telephone terminals; emergency telephone systems; LED [light-emitting diode] displays; light-emitting diodes [LEDs]; optical lanterns; signalling lanterns; audio speakers for elevators; alarms for elevators; intercom apparatus; video intercom apparatus; portable emergency intercoms; acoustic alarms; alarms; bells [warning devices]; distribution boards and boxes [electricity]; electronic notice boards; electronic publications, downloadable; flashing lights [luminous signals]; reflective safety vests; thermostats; fire-extinguishing apparatus