Patents by Inventor Victor E. Kohn

Victor E. Kohn 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).

  • Dye toning system
    Patent number: 4124390
    Abstract: Disclosed herein is a system for selectively mordanting a dye to preselected areas of a black and white photographic silver image and rapidly removing all traces of the dye from the non-image areas. The system includes novel processing compositions to enable the entire process to be carried out rapidly with a minimum amount of equipment.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: November 7, 1978
    Assignee: Recognition Systems, Inc.
    Inventor: Victor E. Kohn