Patents by Inventor Ciaran B. Close

Ciaran B. Close 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).

  • DRAM parity protection scheme
    Patent number: 6125466
    Abstract: A scheme for protecting memory stored in a DRAM using a combination of horizontal and vertical parity data to detect and correct errors in a protected space of memory in which code is stored. The DRAM memory of this scheme is architected with the code stored in horizontally contiguous bytes and the vertical parity, generated when the code is compiled, also stored in horizontally contiguous bytes, but in a row of DRAM memory separate from those in which the code is stored.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: September 26, 2000
    Assignee: Cabletron Systems, Inc.
    Inventors: Ciaran B. Close, Richard A. Gahan, Bryan T. Campbell
  • Multiplexing scheme for modem control signals
    Patent number: 5202884
    Abstract: In an apparatus to couple a plurality of line interfaces with corresponding modems ports, status and control signals are time-division-multiplexed (TDM) into a data stream before being exchanged between the devices. This substantially reduces the number of communication wires required and allows for several modems to be coupled in close proximity to a line interface card. Packet recognition circuitry coupled to the modem ports insures that signals in the TDM data stream are transmitted to the appropriate modem ports.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: April 13, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Ciaran B. Close, Bryan T. Campbell, Una M. Quinlan