Patents by Inventor David Charles Amundson

David Charles Amundson 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).

  • Publication number: 20100198081
    Abstract: This invention describes the detection of atherosclerotic plaque or cancer cells by a light probe inside a blood vessel or internal to an elongate organ. In one embodiment, vessel wall is imaged by employing a scanning mechanism using one emitting and one receiving fiber, whereby light is directed at a spinning mirror, approximately normal to the vessel or elongate organ surface. The light is reflected circumferentially around the vessel or elongate organ surface as the mirror rotates and received by a low-numerical aperture (NA) fiber, which transmits it to a light detector, thereby generating a set of light amplitudes circumferentially around the vessel/elongate organ surface. Multiple rings are acquired by translating the probe within the vessel/elongate organ. In another embodiment, adding a piezoelectric transducer in proximity to the distal ends of the fibers permits simultaneous ultrasound and light images to be created.
    Type: Application
    Filed: February 2, 2009
    Publication date: August 5, 2010
    Inventors: John Harold Hanlin, David Charles Amundson
  • Patent number: 4033355
    Abstract: An implantable electrode lead assembly for coupling an electrical stimulator pulse generator to an internal organ and a method for preparing such an assembly, the electrode lead assembly including a coiled conductor wound in the form of a helix about a central axis. An electrical conductor is encapsulated within a coaxially disposed flexible cylindrical sleeve, with the sleeve including separate inner and outer tubular elements. The inner tubular element is fabricated from a semi-conductive silicone rubber having a resistivity of less than about 130 ohm-cm., and with the outer tubular element comprising an electrically insulative silicone rubber, with both tubular elements having the property of expanding upon exposure to certain solvents or other mediums. The preparation operations utilize the expansion characteristic to form a unitary lead assembly.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: July 5, 1977
    Assignee: Cardiac Pacemakers, Inc.
    Inventor: David Charles Amundson