Patents by Inventor John Mark Mullen

John Mark Mullen 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).

  • Intelligent concentrator for multiple speed data communications systems
    Patent number: 6192035
    Abstract: An intelligent multistation access unit is provided having a transmission speed detection circuit for determining the data transmission speed of an attached device attempting to gain access to a node of a multiple transmission rate digital data communications network. The intelligent multistation access unit is comprised of a speed detect circuit, which indicates the data transmission speed of the attached device, a switching circuit which directs the attached device to the speed detect circuit until switched to allow the attached device access to the network node, and a processor that controls the switching circuit and which permits the attached device access to the node depending on the data transmission speed indication.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: February 20, 2001
    Assignee: International Business Machines Corporation
    Inventors: Andrew Keith Boggs, Quy N. Hoang, Joe Jacobs, John Mark Mullen, Challis Purrington, Laura A. Weaver
  • Intelligent concentrator for multiple speed data communications systems
    Patent number: 5703872
    Abstract: An intelligent multistation access unit is provided having a transmission speed detection circuit for determining the data transmission speed of an attached device attempting to gain access to a node of a multiple transmission rate digital data communications network. The intelligent multistation access unit is comprised of a speed detect circuit, which indicates the data transmission speed of the attached device, a switching circuit which directs the attached device to the speed detect circuit until switched to allow the attached device access to the network node, and a processor that controls the switching circuit and which permits the attached device access to the node depending on the data transmission speed indication.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: December 30, 1997
    Assignee: International Business Machines Corporation
    Inventors: Andrew Keith Boggs, Quy N. Hoang, Joe Jacobs, John Mark Mullen, Challis Purrington, Laura A. Weaver