Patents by Inventor Dan J. Lutkenhouse

Dan J. Lutkenhouse 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).

  • Expandable trailer van
    Patent number: 4092039
    Abstract: An expandable trailer van having vertically extensible roof, side and end walls to facilitate the loading and unloading of the trailer, the roof and side walls being formed of flexible material forming a tarpaulin which conforms to the configuration of the cargo being transported when the roof and side walls are in the lowered position.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: May 30, 1978
    Inventor: Dan J. Lutkenhouse