Patents by Inventor Noah R. Mendelsohn

Noah R. Mendelsohn 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).

  • Patent number: 5940612
    Abstract: A procedure controls execution of priority ordered tasks in a multi-nodel data processing system. The data processing system includes a node with a software-controlled processor and a hardware-configured queue-controller. The queue-controller includes a plurality of priority-ordered queues, each queue listing tasks having an assigned priority equal to a priority order assigned to the queue.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: August 17, 1999
    Assignee: International Business Machines Corporation
    Inventors: James Thomas Brady, Damon W. Finney, Michael Howard Hartung, Michael Anthony Ko, Noah R. Mendelsohn, Jaishankar Moothedath Menon, David R. Nowlen
  • Patent number: 5784698
    Abstract: An apparatus for dynamically allocating memory includes a processor, a free buffer pool memory and a control memory which stores control block data structures. The control block data structures enable a segmentation of the free buffer pool memory into a series of free buffer pools, each free buffer pool comprising plural identical size buffers, each succeeding free buffer pool including a larger buffer size than a preceding free buffer pool. A selection size parameter for a given free buffer pool is a value that is larger than the buffer size comprising the given free buffer pool, but less than a next larger buffer size in the next of the series of free buffer pools.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: July 21, 1998
    Assignee: International Business Machines Corporation
    Inventors: James Thomas Brady, Damon W. Finney, Michael Howard Hartung, Michael Anthony Ko, Noah R. Mendelsohn, Jaishankar Moothedath Menon, David R. Nowlen
  • Patent number: 5675736
    Abstract: A distributed data processing system includes a plurality of nodes interconnected by bidirectional communication links. Each node includes a control message line for handling of control messages and a control memory for storing the control messages. Each node further includes data message line for handling of data messages and a data memory for storing the data messages. A processor in the node causes the data message line to queue and dispatch data messages from the data memory and the control message line to queue and dispatch control messages from the control memory. Each node includes N bidirectional communication links enabling the node to have at least twice as much input/output bandwidth as the control message line and data message line, combined. An input/output switch includes a routing processor and is coupled between the N bidirectional communication links, the data message line and control message line.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: October 7, 1997
    Assignee: International Business Machines Corporation
    Inventors: James Thomas Brady, Damon W. Finney, Michael Howard Hartung, Paul Wayne Hunter, Michael Anthony Ko, Donald J. Lang, Noah R. Mendelsohn, Jaishankar Moothedath Menon, David Ronald Nowlen
  • Patent number: 5577211
    Abstract: A computing system includes plural nodes that are connected by a communications network. Each node comprises a communications interface that enables an exchange of messages with other nodes. A ready queue is maintained in a node and includes plural message entries, each message entry indicating an output message control data structure. The node further includes memory for storing plural output message control data structures, each including one or more chained further monrtol data structures that define data comprising a message or a portion of a message that is to be dispatched. Control data structures that are chained from an output messsage control data structure exhibit a sequence dependincy. A processor is controlled by the ready queue and enables dispatch of portions of the message designated by an output message control data structure and associated further control structures.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: November 19, 1996
    Assignee: IBM Corporation
    Inventors: Narasimhareddy L. Annapareddy, James T. Brady, Damon W. Finney, Richard F. Freitas, Michael H. Hartung, Michael A. Ko, Noah R. Mendelsohn, Jaishankar M. Menon, David R. Nowlen, Shin-Yuan Tzou
  • Patent number: 5313628
    Abstract: Apparatus is described for component replacement control in a data processing system, with each component being assigned a label that includes a component identifier and a replacement generation value. The apparatus includes a plurality of tables for redundantly storing replacement generation values for each component. The tables that store the replacement generation values are then updated to indicate the incremented replacement generation value for the new component. Circuitry then increments the replacement generation value assigned to a component identity that is replaced by a new component. The circuitry modifies the new component's label to indicate the incremented replacement generation value. When the system is subsequently started, the replacement generation values in each component's label are compared with the replacement generation values in the tables and wherever a match is not found, the component is rejected.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: May 17, 1994
    Assignee: International Business Machines Corporation
    Inventors: Noah R. Mendelsohn, James Perchik, Thomas R. Hancock
  • Patent number: 5201044
    Abstract: A data processing system includes both volatile and nonvolatile memories, user-inaccessible file control software and performs a method for recovering from a malfunction occurring during a file transaction that prevents accomplished microscopic transactions from being lost.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: April 6, 1993
    Assignee: International Business Machines Corporation
    Inventors: Alexander H. Frey, Jr., Richard C. Mosteller, Joel M. Gould, Noah R. Mendelsohn, James Perchik