U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Proximity based toll free communication services

Patent 5561704 Issued on October 1, 1996. Estimated Expiration Date: Icon_subject 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 References

Cellular telephone unit capable of automatic interaction with audio services
Patent #: 4964156
Issued on: 10/16/1990
Inventor: Blair

Broadcast receiver capable of selecting stations based upon geographical location and program format
Patent #: 4969209
Issued on: 11/06/1990
Inventor: Schwob

Emergency call locating system
Patent #: 5109399
Issued on: 04/28/1992
Inventor: Thompson

Vehicle tracking and security system
Patent #: 5223844
Issued on: 06/29/1993
Inventor: Mansell, et al.

Directory assistance call completion via mobile systems Patent #: 5339352
Issued on: 08/16/1994
Inventor: Armstrong, et al.

Inventor

Assignee

Application

No. 214341 filed on 03/16/1994

US Classes:

455/456.5, At system equipment (i.e., base station)342/457Land vehicle location (e.g., bus, police car

Examiners

Primary: Kuntz, Curtis
Assistant: Trost, William

International Classes

H04M 011/00
H04Q 007/22

Abstract

A 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.

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