Patents by Inventor Douglas W. Dickinson

Douglas W. Dickinson 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: 4878492
    Abstract: A laser balloon catheter intended primarily for coronary angioplasty includes a flexible tube having an inflatable balloon secured to its distal end, a central shaft within the balloon for carrying a guide wire, an optical fiber for carrying laser radiation through the flexible tube into the balloon, and a tip assembly in the balloon for directing laser radiation outwardly through a major portion of the balloon surface while limiting shadowing by the central shaft. The tip assembly preferably includes a tip portion of the optical fiber contained within a transparent, heat-formable tube and formed into a spiral shape around the central shaft by the heat-formable tube. The optical fiber tip portion is tapered so that it directs laser radiation outwardly over its length. Deuterium oxide is preferably used for inflation of the balloon because of its very low attenuation of laser radiation in the wavelength range of interest.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: November 7, 1989
    Assignee: C. R. Bard, Inc.
    Inventors: Edward L. Sinofsky, J. Richard Spears, Douglas W. Dickinson, Maria S. Wagner
  • Patent number: 4850351
    Abstract: A catheter having optical fibers for delivering laser energy to a blood vessel to remove obstructions in the blood vessel is adapted to be guided controllably and selectively by a guide wire to the site to be treated. The catheter includes a central lumen which is open at the distal end of the catheter and which receives the guide wire so that the catheter may be advanced over the guide wire. A relatively few number of optical fibers are contained within and extend longitudinally of the catheter wall. The distal tip of the catheter is provided with a cylindrical optically transparent end cap and means are provided to securely mount the distal ends of the optical fibers with respect to the end cap so that the light emitted from the ends of the fibers passes through the cylindrical wall of the end cap and is emitted at the distal emissions face of the end cap.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: July 25, 1989
    Assignee: C. R. Bard, Inc.
    Inventors: Stephen J. Herman, Laurence A. Roth, Edward L. Sinofsky, Douglas W. Dickinson, Jr.