Patents by Inventor Dieter Hermann Mühlfriedel

Dieter Hermann Mühlfriedel 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).

  • Drill for drilling, a method for making a drill for drilling, and a cutting tool
    Patent number: 6688817
    Abstract: A method of making a drill comprising a tip (16), a shank (10) and a flute area having chip spaces (12, 14) formed therein, the drill being substantially completely coated with a hard material, and is characterized by applying an abrasive material to merely the tip (16) before coating the drill with the hard material. The drill may more particularly be a solid carbide drill.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: February 10, 2004
    Assignee: Kennametal Inc.
    Inventors: Bernhard Walter Borschert, Dieter Hermann Mühlfriedel, Karl-Heinz Wendt