Improved optical particle detectors

Improved patient/nurse call system

Improved personal duress security system

Improved road safety device

Improved taut wire security system

Improvement to smoke alarms

Improvement(s) related to particle monitors and method(s)...

Improvements in aircraft doors

Improvements in and relating to alarms

Improvements in and relating to emergency devices

Improvements in and relating to emitters

Improvements in and relating to smoke detectors

Improvements in or relating to article tagging

Improvements in or relating to packaging/display of products

Improvements in or relating to security devices

Improvements in security enclosure manufacture

Improvements in security systems

Improvements relating to event detection and recordal

Improvements relating to locating devices

Improvements to particle detectors