Patents by Inventor Charlotte A. Walker

Charlotte A. Walker 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).

  • Prosthetic heart valve with sewing ring
    Patent number: 5397346
    Abstract: A prosthetic mechanical heart valve with a suture ring and stiffening ring combination which minimizes the radial thickness of the sewing ring. The valve comprises an annular stiffening ring captured between .upper and lower rings which are sewed into a knit fabric tube. The entire assembly of sewing ring and stiffening ring is then assembled as a unit onto the mechanical heart valve.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: March 14, 1995
    Assignee: Carbomedics, Inc.
    Inventors: Charlotte A. Walker, Joseph A. Sauter, Louis A. Campbell