Patents by Inventor Pierre Haskelson

Pierre Haskelson 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).

  • Grid patterned file folders
    Patent number: 4909543
    Abstract: A paper file folder has a repeating inked grid pattern. Each element of the pattern has printed lines surrounding an uninked background. The folder is used as an office product to provide decoration, a means for neat uniform labelling and a surface for optimal glue adhesion.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: March 20, 1990
    Assignee: Esselte Pendaflex Corporation
    Inventor: Pierre Haskelson