Patents Assigned to Highway Master Communications, Inc.
  • Vehicle locating and communicating method and apparatus
    Patent number: 5832394
    Abstract: A method and apparatus for locating and communicating with vehicles is provided, including at least one mobile cellular unit connected to at least one microprocessor and installed within a vehicle. The microprocessor interrogates the mobile cellular unit to obtain location information from an overhead message stream transmitted from cellular telephone transmitter sites. The location is displayed on a display located in the vehicle or the microprocessor periodically instructs the mobile cellular unit to initiate a call to a host controller and, upon receipt of transmitting instructions from the host controller, transmits the location information for display on a screen connected to the host controller.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: November 3, 1998
    Assignee: Highway Master Communications, Inc.
    Inventor: Larry C. Wortham
  • Vehicle locating and communicating method and apparatus
    Patent number: 5513111
    Abstract: A method and apparatus for locating and communicating with vehicles is provided, including at least one mobile cellular unit connected to at least one microprocessor and installed within a vehicle. The microprocessor interrogates the mobile cellular unit to obtain location information from an overhead message stream transmitted from cellular telephone transmitter sites. The location is displayed on a display located in the vehicle or the microprocessor periodically instructs the mobile cellular unit to initiate a call to a host controller and, upon receipt of transmitting instructions from the host controller, transmits the location information for display on a screen connected to the host controller.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: April 30, 1996
    Assignee: Highway Master Communications, Inc.
    Inventor: Larry C. Wortham