Patents by Inventor Erik Kjellqvist

Erik Kjellqvist 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).

  • Mounting device or book for storing, displaying and handling transparent pictures
    Patent number: 3965595
    Abstract: A mounting or book for storing, displaying and handling transparencies having at least two sheet sets, each set containing at least one sheet which is pivotally mounted in the book in a manner so that any single sheet can be separately displayed or superimposed upon a single sheet of a further set. At least one carrier frame has a set of sheets hinged to it at one or both edges so that any sheet from a set can be pivoted toward the center of the carrier.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: June 29, 1976
    Assignee: Almqvist & Wiksell Forlag AB
    Inventor: Erik Kjellqvist