Appeal No. 1999-0172 Application 08/334,733 tracking, cargo location, and so forth” (column 6, lines 48 through 50). In this vein, Mansell notes, for example, that “freight hauling firms have always had a need for tracking the vehicles in their fleets” (column 2, lines 2 and 3). In general, the system consists of a set of mobile units 100 provided on respective vehicles 102 (e.g., delivery vehicles), a control center 150 and a communications link 110 between the mobile units and the control center. Each mobile unit includes a Global Positioning System (GPS) receiver 314 and a transceiver/antenna assembly 316, 316A, and the control center includes a communications controller 170, a reference GPS receiver for providing real-time error correction of the vehicle location measurement using differential GPS techniques (see column 7, line 42, through column 8, line 6) and displays 182 for graphically showing the locations of the vehicles on maps. The system functions as described throughout the Mansell disclosure to accurately track the real-time locations of the vehicles. Anticipation is established when a single prior art reference discloses, expressly or under principles of 9Page: Previous 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NextLast modified: November 3, 2007