Patents by Inventor William R. Andersen

William R. Andersen 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: 8381161
    Abstract: A computer-implemented method identifies at least one proprietary geometric figure from a plurality of geometric figures within a design data layout format file. The proprietary geometric figure in the design data layout format file may be replaced with a placeholder geometric figure. Cell names and connection names associated with the proprietary geometric figure are renamed from a netlist file that defines electrical connections between the geometric figures with obfuscating names. A modified design data layout format file may be generated that includes the placeholder geometric figure and a modified netlist file including the obfuscating names. The modified file enables IC designers to complete their design and checking activities, but inhibits reverse-engineering of the proprietary geometric & netlist data.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: February 19, 2013
    Assignee: International Business Machines Corporation
    Inventors: William R. Andersen, Oded Katz, Rina Kipnis, Lansing D. Pickup, Christopher B. Reynolds, Joseph H. Underwood
  • Patent number: 6804132
    Abstract: An apparatus for reading out multiple match hits from a content addressable memory (CAM), comprising a priority encoder for receiving a plurality of matchlines from a CAM and for encoding addresses of the CAM that are associated with the matchlines that indicate a match, and a matchline mask system for selectively masking off a matchline that indicates a match from the priority encoder after the address associated with that matchline is encoded by the priority encoder.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: October 12, 2004
    Assignee: International Business Machines Corporation
    Inventors: William R. Andersen, Joseph H. Heinrich
  • Publication number: 20040100809
    Abstract: An apparatus for reading out multiple match hits from a content addressable memory (CAM), comprising a priority encoder for receiving a plurality of matchlines from a CAM and for encoding addresses of the CAM that are associated with the matchlines that indicate a match, and a matchline mask system for selectively masking off a matchline that indicates a match from the priority encoder after the address associated with that matchline is encoded by the priority encoder.
    Type: Application
    Filed: November 25, 2002
    Publication date: May 27, 2004
    Applicant: International Business Machines Corporation
    Inventors: William R. Andersen, Joseph H. Heinrich