Patents by Inventor Ralph Lewin

Ralph Lewin 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).

  • Anti-sway device
    Patent number: 4154454
    Abstract: An anti-sway device for a towing vehicle and a trailer is disclosed, comprising a channel rigidly mounted on the underside of a trailer hitch attached to the towing vehicle and a rigid elongated member mounted on the trailer and engageable within the channel, whereby, when the member is so engaged, lateral movement of the trailer with respect to the vehicle is prevented.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: May 15, 1979
    Inventor: Ralph Lewin