RADIO RECEIVER UNITS

Brand	Owner (click to sort)	Address	Description
ACCESSMASTER	CHAMBERLAIN GROUP, INC., THE	845 Larch Avenue Elmhurst IL 60126	radio receiver units, radio transmitter units, keypads card readers, control panels, and for controlling electronic door and gate openers, and parts therefor;ACCESS MASTER;
ACCESSPRO	GTO ACCESS SYSTEMS	3121 Hartsfield Rd. Tallahassee FL 32303	radio receiver units, radio transmitter units, and control panels for operation of electronic door openers and gate openers;
SCANTRAC	ELECTRONIC WARFARE ASSOCIATES, INC.	13873 Park Center Road Herndon VA 22071	radio receiver units, computers and computer software for monitoring and recording radio frequency transmissions;SCAN TRACK;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A portable GPS/radio unit communicates over a wireless radio network with at least one other unit which is transmitting radio signals over the network indicative of that unit's location. The GPS/radio unit comprises a GPS receiver for receiving satellite signals from a plurality of satellites, a radio receiver for receiving the radio signals transmitted by the other unit, a processor for calculating the unit's location as a function of the received satellite signals and for identifying the location of the other unit based on the received radio signals, and a display for indicating the location of the other unit. The display may indicate the respective locations of multiple units and may also display unique identifiers for each of the units. A system and method for indicating the location of one portable GPS/radio unit on the display of another portable GPS/radio unit involves at least two such units communicating with one another over a wireless radio network.