Patents by Inventor John Leppelmeier

John Leppelmeier 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: 20120004661
    Abstract: A drill bit includes a body extending along an axis and including a point end and a shank end. The drill bit also includes a first helical portion, having a first helix angle relative to the axis. The drill bit also includes a second helical portion, having a second helix angle relative to the axis which is different from the first helix angle.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 5, 2012
    Inventor: John Leppelmeier