Patents by Inventor Richard F. Arnold

Richard F. Arnold 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: 4564944
    Abstract: A method and an apparatus are disclosed for converting error syndromes of an error-correcting code to pointers which identify the positions of the erroneous bits. Each syndrome is converted by a plurality of hashing functions into a plurality of hash words, which in turn are used to address a plurality of read-only stores. The outputs of the read-only stores are logically combined to obtain the respective error pointer. A preferred embodiment uses three hashing functions (41, 43, 45) and three read-only stores (53, 55, 57) and combines their outputs by an Exclusive-Or function (59). The storage capacity and the processing time required for syndrome-to-error pointer conversion are reduced by the disclosed scheme.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: January 14, 1986
    Assignee: International Business Machines Corporation
    Inventors: Richard F. Arnold, John Cocke, Don Coppersmith, Adrian E. Seigler, Gary E. Strait