Patents by Inventor William Stuart Holloway

William Stuart Holloway 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).

  • Spade drill
    Patent number: 4060335
    Abstract: A spade drill is provided with a holder for a spade cutting blade which is clamped in a slot of the holder by means of a clamp screw. The spade cutting blade is essentially formed with a cutting surface coming to a central point and of the same shape as the first cutting surface with an abutment surface located within the spade drill holder in the clamping slot which receives the cutting surface for holding the bit in place with means in the form of a clamp located across the clamping slot to grip the spade drill bit.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: November 29, 1977
    Assignee: Amtel, Inc.
    Inventors: William Stuart Holloway, Manfred Grunsky