Patents by Inventor Hans Wihlke

Hans Wihlke 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: 4447973
    Abstract: An album leaf with insertion pockets for mounting of planar rectangular articles and comprising at least two superimposed layers of especially plastic, the lower or intermediate layer being opaque while the other layer or layers being transparent, the layers being joined together along the peripheral leaf edges and along frame lines defining the article pockets, the album leaf having a horizontally oriented rectangular format with a margin along one of the short sides of the leaf for binding purposes, the leaf with reference to the binding margin being symmetric relative to the longitudinal center axis of the binding margin, so that the leaf may be turned around said axis and the leaf having a length on the short side being substantially at least equal to the sum of the length of one short and one long side of an article, while having a length on the long side being substantially equal to twice the length of the article on the long side.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: May 15, 1984
    Inventor: Hans Wihlke