Patents by Inventor Timothy J. Herrstrom

Timothy J. Herrstrom 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).

  • Resilient sign post attachment
    Patent number: 4737048
    Abstract: A road sign attachment and repair apparatus having first and second U-shaped brackets adapted to be attached to a wooden sign post near the bottom thereof to form a resilient joint or to form such resilient joint at a place where a wooden sign post has been broken off. Four coil springs are attached to one of the U-shaped brackets at one end thereof and to the other U-shaped bracket at the other end thereof.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: April 12, 1988
    Inventor: Timothy J. Herrstrom