Proximity based toll free communication services
Patent 5561704 Issued on October 1, 1996. Estimated Expiration Date: 
March 16, 2014. 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.
March 16, 2014. 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 telephone unit capable of automatic interaction with audio services Broadcast receiver capable of selecting stations based upon geographical location and program format Emergency call locating system Vehicle tracking and security system Directory assistance call completion via mobile systems Patent #: 5339352 InventorAssigneeApplicationNo. 214341 filed on 03/16/1994US Classes:455/456.5, At system equipment (i.e., base station)342/457Land vehicle location (e.g., bus, police carExaminersPrimary: Kuntz, CurtisAssistant: Trost, William International ClassesH04M 011/00H04Q 007/22 AbstractA caller in a mobile vehicle requiring service determines his location such as longitude and latitude and transmits his location and service requirements in numbers; by wireless mobile phone tone signals to a remote directory station containing a data base with the phone numbers, service classifications and locations of service providers in the area of the caller to derive the telephone number of a provider who is conveniently closest to the caller and connects the caller to the communication channel of the selected telephone number or advises the caller of the selected providers telephone number. The database is regularly updated by the addition and deletion of providers subscribing to the service.Field of SearchWith memory control or programming | |
