Air purifying respirator masks to prevent injury due to dust inhalation; Air/fuel ratio gauges; Anti-intrusion alarms; Burglar alarms; Clothing for protection against fire; Fire-extinguishers; Fire-extinguishing balls; Fire-extinguishing blankets; Fire-extinguishing systems; Fire alarms; Fire and smoke detectors; Fire blankets and fire extinguishers; Fire extinguishing apparatus; Fire extinguishing apparatus for automobiles; Gas masks