Patents by Inventor David R. Overby

David R. Overby 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).

  • Patent number: 4029408
    Abstract: The present invention relates to a map reading device or apparatus adapted to receive a film having a series of frames of map indicia thereon, each map indicia frame representing a certain geographical area such as a State, a portion of a State, a City, a portion of a City, or County, etc. Light is projected through any one of a series of certain desired map indicia frames and a map image is thusly formed. The formed map image is directed through a magnifying lens that magnifies or enlarges the map image and projects the same on a forwardly spaced screen within the map reading apparatus where the map can easily and conveniently be read and studied even while operating a motor vehicle.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: June 14, 1977
    Inventor: David R. Overby