Patents by Inventor Larry Landgraf

Larry Landgraf 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).

  • Utility trailer security device
    Patent number: 8152194
    Abstract: An object of this invention is to provide a way for a person to lock and secure the hitch of an unhitched utility trailer. Another object of this invention is to allow a person to keep an unhitched utility trailer from being stolen when the utility trailer is not hooked to a truck hitch.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: April 10, 2012
    Inventors: Larry Landgraf, Sam F. Manna, Jr., Maggie Ann Fitzgerald