Patents by Inventor Sven H. H. Nauckhoff

Sven H. H. Nauckhoff 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: 4620276
    Abstract: Messages at nodes of a distributed data system are processed asynchronously. Each data atom shared by a pair of nodes is characterized by dipole halves maintained at each node including an access control characteristic, a quality control characteristic, and a pair of rank values. A rank value is a value which monotonically increases (with respect to time) with each significant event. A message from a paired node requesting a change to a dipole half at this node includes the set of rank values at the paired node for the shared data atom. This node compares the rank values which it maintains with those received from the paired node and, based upon the result, selectively rejects or processes the request.
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: October 28, 1986
    Assignee: International Business Machines Corporation
    Inventors: Thomas P. Daniell, Robert C. Harding, Jr., Roger W. R. Harvey, Sven H. H. Nauckhoff
  • Patent number: 4432057
    Abstract: A method for dynamic replication of data under distributed system control to control the utilization of resources in a multiprocessing, distributed data base system. Previously, systems providing for data replication at nodes of a multiprocessing, distributed data base system required that a central node maintain control, or that replicated data be synchronized by immediately conforming all copies of an updated data item. By this invention, requests for access to data of a specified currency are permitted and conformation of updated data is selectively deferred by use of a control procedure implemented at each node and utilizing a status and control (SAC) filed at each node which describes that node's view of the status for shared data items at other nodes.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: February 14, 1984
    Assignee: International Business Machines Corporation
    Inventors: Thomas P. Daniell, Robert C. Harding, Jr., Neil J. Lewis, Sven H. H. Nauckhoff