Patents by Inventor David W. Stassen

David W. Stassen 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: 9833328
    Abstract: A method of resurfacing a facet joint with a facet implant system. The facet joint includes a superior facet and an inferior facet that are adjacent to each other and movable with respect to each other. A first facet implant component is provided that has a first visualization marker. The first visualization marker includes a first marker section and a second marker section. The first marker section is oriented at an angle with respect to the second marker section. The first facet implant component between the superior facet and the inferior facet. A location and an orientation of the first facet implant component are determined using an imaging technique that locates the first visualization marker.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: December 5, 2017
    Assignee: Zyga Technology
    Inventors: Robert L. Assell, Brian P. Beaubien, David W. Stassen
  • Patent number: 9233006
    Abstract: A facet implant system for implanting between a superior facet and an inferior facet. The facet implant system includes a first facet implant component and a second facet implant component. The first facet implant component has a first articulating surface and a first engagement surface located opposite the first articulating surface. The first facet implant component has a leading edge and a trailing edge. The first facet implant component has teeth that extend from the first engagement surface. The teeth are arranged in a plurality of rows and wherein teeth in adjacent rows are offset from each other. The second facet implant component has a second articulating surface and a second engagement surface located opposite the second articulating surface. The second facet implant component has teeth that extend from the second engagement surface.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: January 12, 2016
    Assignee: Zyga Technology, Inc.
    Inventors: Robert L. Assell, Brian P. Beaubien, David W. Stassen
  • Publication number: 20150119988
    Abstract: A method of resurfacing a facet joint with a facet implant system. The facet joint includes a superior facet and an inferior facet that are adjacent to each other and movable with respect to each other. A first facet implant component is provided that has a first visualization marker. The first visualization marker includes a first marker section and a second marker section. The first marker section is oriented at an angle with respect to the second marker section. The first facet implant component between the superior facet and the inferior facet. A location and an orientation of the first facet implant component are determined using an imaging technique that locates the first visualization marker.
    Type: Application
    Filed: January 8, 2015
    Publication date: April 30, 2015
    Inventors: Robert L. Assell, Brian P. Beaubien, David W. Stassen
  • Patent number: 8961613
    Abstract: A low friction resurfacing implant system including a first implant component having a first bearing surface and a first engagement surface. The first engagement surface is located opposite the first bearing surface. The first implant component has a leading edge and a trailing edge. The first implant component includes teeth that extend from the first engagement surface. The teeth are arranged in a plurality of rows. The teeth in adjacent rows are offset from each other.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: February 24, 2015
    Assignee: Zyga Technology, Inc.
    Inventors: Robert L. Assell, Brian P. Beaubien, David W. Stassen
  • Publication number: 20140135938
    Abstract: A low friction resurfacing implant system including a first implant component having a first bearing surface and a first engagement surface. The first engagement surface is located opposite the first bearing surface. The first implant component has a leading edge and a trailing edge. The first implant component includes teeth that extend from the first engagement surface. The teeth are arranged in a plurality of rows. The teeth in adjacent rows are offset from each other.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Applicant: Zyga Technology, Inc.
    Inventors: Robert Assell, Brian P. Beaubien, David W. Stassen
  • Patent number: 5658337
    Abstract: A intervertebral fusion implant includes first and second bearing surfaces which oppose cortical bone upon insertion of the implant into a bore formed between two vertebrae. The implant includes first and second ridges which extend from the bearing surface. The ridges extend through the cortical bone into cancellous bone. The ridges are provided with openings formed through the ridges. The openings are in communication with the interior of the implant.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: August 19, 1997
    Assignee: Spine-Tech, Inc.
    Inventors: Douglas W. Kohrs, Hansen A. Yuan, David W. Stassen
  • Patent number: 5609636
    Abstract: An implant for use in spinal stabilization includes four generally linear thread segments. The thread segments are maintained and spaced apart alignment by rigid supports. The thread segments include a plurality of individual threads with the individual threads of the segments defining a thread pattern. The supports and the thread segments define a hollow implant interior exposed to an exterior of the implant.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: March 11, 1997
    Assignee: Spine-Tech, Inc.
    Inventors: Douglas W. Kohrs, Hansen A. Yuan, David W. Stassen