Patents by Inventor Ralph James Koerner

Ralph James Koerner 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).

  • Stitching method and apparatus employing thread payout detection
    Patent number: 7210417
    Abstract: A method and apparatus for producing uniform stitches in a stack of fabric layers while allowing a user to manually guide the stack across a planar surface beneath a stitch head. Stitch head actuation is controlled as a function of the rate of thread payout.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: May 1, 2007
    Inventor: Ralph James Koerner