On board aircraft weight and centre of gravity synchro-type...
On the counter deactivator
On-board air traffic surveillance display distinguishing...
On-line serial communication interface from a computer to a...
On-line serial communication interface from a current loop...
On-line serial communication interface from a transmitter to...
On-line serial communication interface to a transmitter from...
On-screen displaying apparatus
On-vehicle radio communication equipment, a dedicated short...
One button multifunction key fob for controlling a security...
Open transmission line intrusion detection system using...
Open transmission line locating system
Open transmission line locating systems
Operating system for a motorized barrier operator with a...
Operation control means of a machine, a vehicle or a plant
Operation recorder for motor vehicle safety device
Operational signal system and signal light arrangement
Optical acoustical signalling apparatus
Optical connection system
Optical device for monitoring clarity of a fluid