Patents by Inventor Karl Walter Greiner

Karl Walter Greiner 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 house trailer structure
    Patent number: 4114942
    Abstract: A shell structure is pivoted outwardly of a house trailer to enlarge the floor area. The shell structure can include three sides positioned over a cabin or portion of a cabin, and the shell structure is pivotal about a horizontal axis near the level of the floor of the cabin which is mounted on the trailer frame. When pivoted outwardly, a folding slidable or extensible roof can be positioned on the upper edges of the shell structure.
    Type: Grant
    Filed: October 20, 1976
    Date of Patent: September 19, 1978
    Inventor: Karl Walter Greiner