Patents by Inventor Sidney W. Eiden

Sidney W. Eiden 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).

  • Field marker
    Patent number: 4218059
    Abstract: A marker for delineating boundary and playing lines on an athletic field or the like comprises a hollow elongated keystone shaped body member having converging side walls and an open top face with a clearly colored cushioning member in the upper portion thereof and exposed at the top face so that the body member may be embedded in the ground with the cushioning member exposed at ground level.
    Type: Grant
    Filed: June 23, 1978
    Date of Patent: August 19, 1980
    Inventor: Sidney W. Eiden