Patents by Inventor Eugene R. Wolfe

Eugene R. Wolfe 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).

  • Audible warning signal for roadway work zones
    Patent number: 6807923
    Abstract: In a preferred embodiment, an audible warning device for use with a visual warning sign, comprising: a first segment to comprise part of a staff to which a visible warning portion is attached; and selectively activatable audible warning means disposed integrally with the first segment.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: October 26, 2004
    Inventors: James P. Wolfe, Eugene R. Wolfe, Ryan J. Wolfe