Vehicle location system
Patent 5119102 Issued on June 2, 1992. Estimated Expiration Date: 
January 23, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 23, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCellular position locating system Patent #: 5043736 InventorApplicationNo. 644792 filed on 01/23/1991US Classes:342/357.09, With transmission of location-indicative information to or from a remote station342/357.14, Combined with secondary navigation system (i.e., LORAN, gyroscope, inertial, dead reckoning, etc.)342/457Land vehicle location (e.g., bus, police carExaminersPrimary: Blum, Theodore M.Attorney, Agent or FirmInternational ClassesH04B 007/185G01S 005/02 Foreign Application Priority Data1990-02-28 GBAbstractSignals from a number of NAVSTAR global positioning system (GPS) satellites (11,12,13,14) are received by a receiver (16) in a vehicle (15) and a segment of the signals is stored in a memory (18) prior to retransmission by a transmitter (19). A base station (35) receives these transmissions from the mobile unit using a first receiver (36). The base station also receives signals directly from the NAVSTAR GPS satellites using a second receiver (38). A control and calculating apparatus (37) within the base station can determine the ephemeris (course) information for the satellites and can measure the transmission times or propagation delays of signals between the satellites and the vehicle and with this information the control and calculating apparatus can calculate the position of the vehicle unit. | |
