Patents by Inventor Oskar Daster

Oskar Daster 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).

  • Sheet-supporting device
    Patent number: 4075773
    Abstract: A device for interchangeably supporting sheets in an upright position, particularly for displaying menu cards and the like, comprises interconnected wall portions defining a socket for one or more sheets. The wall portions have mutually inclined sheet-contacting surfaces which flex an inserted sheet and increase its rigidity in the longitudinal direction of the flexure.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: February 28, 1978
    Inventor: Oskar Daster