Patents by Inventor Michael W. Hoffman

Michael W. Hoffman 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).

  • Methods and implantable medical systems that implement exposure modes of therapy that allow for continued operation during exposure to a magnetic disturbance
    Patent number: 11938326
    Abstract: Implantable medical systems enter an exposure mode of operation, either manually via a down linked programming instruction or by automatic detection by the implantable system of exposure to a magnetic disturbance. A controller then determines the appropriate exposure mode by considering various pieces of information including the device type including whether the device has defibrillation capability, pre-exposure mode of therapy including which chambers have been paced, and pre-exposure cardiac activity that is either intrinsic or paced rates. Additional considerations may include determining whether a sensed rate during the exposure mode is physiologic or artificially produced by the magnetic disturbance. When the sensed rate is physiologic, then the controller uses the sensed rate to trigger pacing and otherwise uses asynchronous pacing at a fixed rate.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: March 26, 2024
    Assignee: Medtronic, Inc.
    Inventors: Hyun J. Yoon, Wade M. Demmer, Matthew J. Hoffman, Robert A. Betzold, Jonathan D. Edmonson, Michael L. Ellingson, Mark K. Erickson, Ben W. Herberg, Juliana E. Pronovici, James D. Reinke, Todd J. Sheldon, Paul R. Solheim
  • System and method for generating psuedo-noise sequences
    Patent number: 6981010
    Abstract: Disclosed is a method for generating psuedo-noise (PN) sequences utilizing a system comprised of a quantizer, and N directly quantized output/input map containing chaotic map cells, each in functional combination with combiner means and an m-bit shift register.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: December 27, 2005
    Assignee: Board of Regents of the University of Nebraska
    Inventors: Sina Balkir, Walter D. Leon Salas, Michael W. Hoffman, Lance C. Perez
  • System and method for joint source-channel encoding, with symbol decoding and error correction
    Patent number: 6892343
    Abstract: Disclosed is a system and method for joint source-channel encoding, symbol decoding and error correction, preferably utilizing an arithmetic encoder with operational error detection space; and a combination sequential, and arithmetic, encoded symbol decoder structure.
    Type: Grant
    Filed: March 24, 2001
    Date of Patent: May 10, 2005
    Assignee: Board of Regents of the University of Nebraska
    Inventors: Khalid Sayood, Michael W. Hoffman, Billy D. Pettijohn
  • System and method for joint source-channel encoding, with symbol decoding and error correction
    Publication number: 20020016945
    Abstract: Disclosed is a system and method for joint source-channel encoding, symbol decoding and error correction, preferably utilizing an arithmetic encoder with operational error detection space; and a combination sequential, and arithmetic, encoded symbol decoder means.
    Type: Application
    Filed: March 24, 2001
    Publication date: February 7, 2002
    Inventors: Khalid Sayood, Michael W. Hoffman, Billy D. Pettijohn
  • System and method for joint source-channel encoding, with symbol, decoding and error correction
    Patent number: RE43231
    Abstract: Disclosed is a A system and method for joint source-channel encoding, symbol decoding and error correction, preferably utilizing an arithmetic encoder with operational error detection space; and a combination sequential, and arithmetic, encoded symbol decoder structure.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: March 6, 2012
    Assignee: Board of Regents of the University of Nebraska
    Inventors: Khalid Sayood, Michael W. Hoffman, Billy D. Pettijohn