Patents by Inventor Chi-Wu James Chang

Chi-Wu James Chang 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).

  • Catheter probe system with inflatable soft shafts
    Patent number: 6016437
    Abstract: A cardiovascular catheter probe system suitable for electrophysiology mapping and radiofrequency ablation of cardiac tissue comprises a plurality of catheter shafts having a proximal end, a distal handle, and a lumen extending therebetween, wherein a distal portion of the shaft is deflectable and inflatable; the wavy soft distal section is inflatable to conform intimately to the irregular intracardiac tissue surface, wherein conducting electrodes are secured on the hills of said inflatable wavy soft shaft.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: January 18, 2000
    Assignee: Irvine Biomedical, Inc.
    Inventors: Hosheng Tu, Chi-Wu James Chang
  • Cardiovascular catheter system with an inflatable soft tip
    Patent number: 5891027
    Abstract: A cardiovascular catheter system or catheter probe system suitable for electrophysiology mapping and radiofrequency ablation of cardiac tissue comprises a catheter shaft having a proximal end, a distal handle, and a lumen extending therebetween, whereby a distal portion of the shaft is deflectable; and the soft distal section is inflatable to conform intimately to the irregular intracardiac tissue surface.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: April 6, 1999
    Assignee: Irvine Biomedical, Inc.
    Inventors: Hosheng Tu, Chi-Wu James Chang