Patents by Inventor Carol J. Ladan

Carol J. Ladan 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).

  • Alphabetic device
    Patent number: 4315748
    Abstract: An alphabetic device is set forth to facilitate an initial reading process by providing additional discrimination cues to letters of traditional written languages. Letters of a written language are reproduced on a substrate such as paper, plastic etc. and confined within a zone. The zone, also reproduced on the substrate, is made up of dots, dashes, or lines arranged in regular arrays. A different zone is used for each letter such that each letter is always associated with its characteristic zone.
    Type: Grant
    Filed: March 22, 1979
    Date of Patent: February 16, 1982
    Assignee: The Governors of the University of Alberta
    Inventors: Jorge Frascara, Walter Jungkind, Carol J. Ladan, Thomas M. Nelson