Patents by Inventor David J. Kovanen

David J. Kovanen 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: 5436974
    Abstract: The invention disclosed here is a method of encoding serial numbers indicating "confidentiality" or "proprietary information" on printed documents. A group of marks in the form of small-sized dots or equivalent markings are repetitively printed across the face of the document. The placement and location of the markings defines a readable binary serial number. Intermixing the markings with the printed matter on the document makes it difficult or impossible to remove the serial number created by the markings, and they will remain on the document after repeated photocopies of it are made.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: July 25, 1995
    Assignee: Innovator Corporation
    Inventor: David J. Kovanen
  • Patent number: D397999
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: September 8, 1998
    Assignee: Innovator Corporation
    Inventors: David J. Kovanen, James Shields