Patents by Inventor Kai Krause

Kai Krause 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).

  • Multiple nonlinear undo buttons
    Patent number: 5757372
    Abstract: A method and an apparatus for saving prior versions of a document so that the user has complete control of which versions of the document are saved, while providing a mechanism for easy retrieval of saved versions. The invention utilizes a set of icons on a screen display which when selected by a pointer device perform an action depending upon the state of the selected icon which may be one of three states.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: May 26, 1998
    Inventors: Kai Krause, Ben Weiss