GPS based time determining system and method
September 26, 2015. 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 ReferencesAutomotive driving direction and position indicator apparatus Airborne flight planning and information system Travel guidance system for vehicles Automotive navigation system World time watch Map display apparatus Vehicle navigation system provided with an adaptive inertial navigation system based on the measurement of the speed and lateral acceleration of the vehicle and provided with a correction unit for correcting the measured values Navigation method for vehicles Operation data recording system Vehicle bearing detection and data processing methods applicable to vehicle navigation system InventorAssigneeApplicationNo. 533904 filed on 09/26/1995US Classes:368/10, COMBINED WITH DISPARATE DEVICE340/988, VEHICLE POSITION INDICATION368/21, PLURAL TIME ZONES368/47, With wireless synchronization701/201, Determination of travel data based on the start point and destination point701/213Using Global Positioning System (GPS)ExaminersPrimary: Miska, Vit W.Attorney, Agent or FirmInternational ClassesG04B 019/22G04C 011/02 G08G 001/12 G06F 015/50 AbstractAn audio entertainment/navigation system with updated time readings is provided especially for a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination database includes a plurality of categorized destinations and corresponding destination position coordinates pertaining to the destinations. The destination database is stored on an interfacable memory card. A time change database is also included which contains time-related information such as time zone boundaries and special time change rules such as daylight saving time. The time-related information may be loaded into the system from an interfacable memory card. A time of day as referenced to a reference time and the date are also computed from the GPS signals. The time and date are compared with the time-related information so as to determine a current updated time and date which is used to periodically update the clock and may be displayed on a display. Also, a user may obtain a current time and date reading for a remote destination by entering the destination name or coordinates into the system.Field of SearchCOMBINED WITH DISPARATE DEVICEPLURAL TIMEPIECE SYSTEM OR SYSTEM DEVICE (E.G., PRIMARY OR SECONDARY CLOCKS) With wireless synchronization PLURAL TIME ZONES With manually actuated display Stock quotation Location indication VEHICLE POSITION INDICATION Land vehicle location (e.g., bus, police car | |
