System for utility meter communications using a single RF freque

System for wireless remote actuation of differing siren programs

System having advanced embedded code hopping encryption and lear

System identification in communications system

System monitoring programmable implanatable transponder

System monitoring programmable implantable transponder

System monitoring programmable implantable transponder

System monitoring programmable implantable transponder

System monitoring reprogrammable implantable transponder

System of apparatus for monitoring a tire condition value in...

System of communications between a post and moving bodies

System of identifying local stations by a central interrogating

System of issuing secure documents of various denomination

System of wire-bus net control devices with minimal rest current

System providing verified information exchange between an electr

System radio transmission of liquid level data and battery savin

System to display sawblade angle and height

System with a lock and a key which cooperate according to the tr

System with replacement meter cover

System, method, and sensors for sensing physical properties