Patents by Inventor Alan L. Madsen

Alan L. Madsen 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).

  • Image display system and method
    Patent number: 4951151
    Abstract: Computer operated projectors are positioned to project onto an uneven surface or relief map prepared to reflect a remote surface. If the remote surface is geographical, the surface is at a scale in which the horizontal scale is substantially larger than the vertical scale. A sound system provides surround sound. A second substrate or movie screen and projector are positioned to provide related video images.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: August 21, 1990
    Assignee: Dawntreader, Inc.
    Inventors: James L. Sorenson, Alan L. Madsen, Ronald E. Madsen, Jr.