Patents by Inventor Michael L. Hofstad

Michael L. Hofstad 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).

  • Temporary atrial cardioversion catheter
    Patent number: 6438426
    Abstract: A coronary sinus catheter includes a distal electrode portion with optimally-spaced and sized ring electrodes and a proximal electrode portion with at least one optimally-spaced and sized larger surface electrode. The catheter has all or some of the following features. First, at least one ring electrode of the distal electrode portion includes a first diameter less than a second diameter of at least one, more proximally disposed, ring electrode of the distal electrode portion. Second, at least one ring electrode of the distal electrode portion includes a first width less than a second width of at least one, more proximally disposed, ring electrode of the distal electrode portion. Third, the distal electrode portion includes at least two ring electrodes and the proximal shock electrode includes at least two larger surface coil electrodes. Fourth, the catheter further includes a collapsible section, adjacent the proximal electrode portion, to facilitate positioning of the catheter within the right atrium.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: August 20, 2002
    Assignee: Daig Corporation
    Inventors: Michael L. Hofstad, John D. Ockuly, Michael J. Coyle, Mark W. Kroll, Steven E. Scott
  • Temporary atrial cardioversion catheter
    Publication number: 20010044645
    Abstract: A coronary sinus catheter includes a distal electrode portion with optimally-spaced and sized ring electrodes and a proximal electrode portion with at least one optimally-spaced and sized larger surface electrode. The catheter has all or some of the following features. First, at least one ring electrode of the distal electrode portion includes a first diameter less than a second diameter of at least one, more proximally disposed, ring electrode of the distal electrode portion. Second, at least one ring electrode of the distal electrode portion includes a first width less than a second width of at least one, more proximally disposed, ring electrode of the distal electrode portion. Third, the distal electrode portion includes at least two ring electrodes and the proximal shock electrode includes at least two larger surface coil electrodes. Fourth, the catheter further includes a collapsible section, adjacent the proximal electrode portion, to facilitate positioning of the catheter within the right atrium.
    Type: Application
    Filed: March 23, 2001
    Publication date: November 22, 2001
    Applicant: DAIG CORPORATION
    Inventors: Michael L. Hofstad, John D. Ockuly, Michael J. Coyle, Mark W. Kroll, Steven E. Scott
  • Temporary atrial cardioversion catheter
    Patent number: 6219582
    Abstract: A coronary sinus catheter includes a distal electrode portion with optimally-spaced and sized ring electrodes and a proximal electrode portion with at least one optimally-spaced and sized larger surface electrode. The catheter has all or some of the following features. First, at least one ring electrode of the distal electrode portion includes a first diameter less than a second diameter of at least one, more proximally disposed, ring electrode of the distal electrode portion. Second, at least one ring electrode of the distal electrode portion includes a first width less than a second width of at least one, more proximally disposed, ring electrode of the distal electrode portion. Third, the distal electrode portion includes at least two ring electrodes and the proximal shock electrode includes at least two larger surface coil electrodes. Fourth, the catheter further includes a collapsible section, adjacent the proximal electrode portion, to facilitate positioning of the catheter within the right atrium.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: April 17, 2001
    Assignee: Daig Corporation
    Inventors: Michael L. Hofstad, John D. Ockuly, Michael J. Coyle, Mark W. Kroll, Steven E. Scott