Patents by Inventor John Thomas Johnston

John Thomas Johnston 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).

  • Sorting system for serially processing records
    Patent number: 5855016
    Abstract: A speed and memory control system and method for use with a sort accelerator having a rebound sorter and merger is disclosed. The speed and memory control system includes a variable length shift register which utilizes circulating RAM indexing, tag extraction lookahead features to speed up access of records, and merge lookahead and memory management features to provide quick and effective storage of records.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: December 29, 1998
    Assignees: Digital Equipment Corporation, National Semiconductor Corporation
    Inventors: Brian Charles Edem, Richard Perham Helliwell, John Thomas Johnston, Richard Franklin Lary