Patents Assigned to Metrofone, Inc.
  • Patent number: 4922517
    Abstract: An interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network is provided. The radio transceiver may be a conventional cellular-type transceiver or other transceiver having typical control inputs and outputs similar to that provided by cellular transceivers. The interface system converts tone-dial or pulse-dial inputs from the telephone into a serial data stream for storage in the transceiver. The interface system automatically determines when the last numeral or digit is dialed and provides a send signal to the transceiver when such determination is made. The system responds to incoming call signals, such as alert signals, from the transceiver and rings the telephone accordingly. The system simulates ring and dial-tone type signals under conditions typical of standard telephone set usage.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: May 1, 1990
    Assignee: Metrofone, Inc.
    Inventors: William L. West, Jr., James E. Shafer
  • Patent number: 4775997
    Abstract: An interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network is provided. The radio transceiver may be a conventional cellular-type transceiver or other transceiver having typical control inputs and outputs similar to that provided by cellular transceivers. The interface system converts tone-dial or pulse-dial inputs from the telephone into a serial data stream for storage in the transceiver. The interface system automatically determines when the last numeral or digit is dialed and provides a send signal to the transceiver when such determination is made. The system responds to incoming call signals, such as alert signals, from the transceiver and rings the telephone accordingly. The system similates ring and dial-tone type signals under conditions typical of standard telephone set usage.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: October 4, 1988
    Assignee: Metrofone, Inc.
    Inventors: William L. West, Jr., James E. Shafer
  • Patent number: 4737975
    Abstract: A programmable interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network is provided. The radio transceiver may be a conventional cellular-type transceiver or other transceiver having typical control inputs and outputs similar to that provided by cellular transceivers. The programmable interface system converts tone-dial or pulse-dial inputs from the telephone into a serial data stream for storage in the transceiver. The programmable interface system can be programmed to automatically determine when the last numeral or digit is dialed for a particular area telephone system and provides a send signal to the transceiver when such determination is made. The system responds to incoming call signals, such as alert signals, from the transceiver and rings the telephone accordingly. The system simulates ring and dial-tone type signals under conditions typical of standard telephone set usage.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: April 12, 1988
    Assignee: Metrofone, Inc.
    Inventor: James E. Shafer
  • Patent number: 4658096
    Abstract: An interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network is provided. The radio transceiver may be a conventional cellular-type transceiver or other transceiver having typical control inputs and outputs similar to that provided by cellular transceivers. The interface system converts tone-dial or pulse-dial inputs from the telephone into a serial data stream for storage in the transceiver. The interface system automatically determines when the last numeral or digit is dialed and provides a send signal to the transceiver when such determination is made. The system responds to incoming call signals, such as alert signals, from the transceiver and rings the telephone accordingly. The system simulates ring and dial-tone type signals under conditions typical of standard telephone set usage.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: April 14, 1987
    Assignee: Metrofone, Inc.
    Inventors: William L. West, Jr., James E. Shafer