Patents by Inventor Donald Cruickshank

Donald Cruickshank has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Computer telecommunications signalling interface
    Patent number: 5343516
    Abstract: A telecommunications signalling interface for computer systems is presented. Control and information signals from the telephone switch are received, decoded, and converted to a standard interface format for retransmission to the computer. Control and information signals from the computer are received and converted to a standard format for transmission to the telephone switch. The power supply for the device may be derived from the telephone network and the computer interface.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: August 30, 1994
    Assignee: Digital Systems Group, Inc.
    Inventors: David Callele, Donald Cruickshank
  • Telephone interface for a computer for receiving and transmitting information during the silent interval between ringing
    Patent number: 5117452
    Abstract: A telecommunications signalling interface for computer systems is presented. Control and information signals from the telephone switch are received, decoded, and converted to a standard interface format for retransmission to the computer. Control and information signals from the computer are received and converted to a standard format for transmission to the telephone switch. The power supply for the device is derived from the telephone network and the computer interface.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: May 26, 1992
    Inventors: David Callele, Donald Cruickshank