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

Systems and methods employing a plurality of signal amplitudes t

Systems and methods employing a plurality of signal amplitudes t

Systems and methods for access filtering employing relaxed recog

Systems and methods for measuring a parameter of a landfill...

Systems and methods for monitoring and controlling tractor/trail

Systems and methods for utility meter data collection

Systems and methods for wirelessly transmitting data from a...

Tactile communication device and method

Tactile communication device and method

Tag location monitor