Patents by Inventor George A. Friedland

George A. Friedland 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).

  • Stainless steel drill screw
    Patent number: 4233880
    Abstract: A drilling and tapping screw constructed from a 300 series stainless steel material which has the corrosive resistance of the high chromium high nickel content stainless steel while still being capable of drilling through carbon steel materials or the like. The product is constructed by forging the point at very slow forging speeds, resulting in a drill screw which is a predominantly martensitic structure at the drill point while predominantly austenitic in the shank and head regions.
    Type: Grant
    Filed: July 20, 1978
    Date of Patent: November 18, 1980
    Assignee: Illinois Tool Works Inc.
    Inventors: Lowell L. Bjorklund, Ramon A. Berg, George A. Friedland