Patents by Inventor Allan G. Kraayvanger

Allan G. Kraayvanger 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).

  • Display device
    Patent number: 4209928
    Abstract: A display device is formed from flexible sheet material and allows one or a plurality of signs to be supported from a common core support. The core support comprises a single sheet having a number of slits at one end that define arms. The support is folded such that the arms extend at angles from each other. The arms are secured around the signs to provide a multi-face display or sign.
    Type: Grant
    Filed: June 23, 1978
    Date of Patent: July 1, 1980
    Assignee: Perrigraphics, Inc.
    Inventor: Allan G. Kraayvanger