Patents by Inventor Joshua C. Cantor

Joshua C. Cantor 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).

  • Documents having a revealable concealed identifier and the method of making such documents
    Patent number: 4715623
    Abstract: A method of impressing a secret pattern on a substrate by the use of an uninked intaglio printing plate having the foreground area with a pattern of ridges and grooves which are distinctively different from the ridges and grooves in a background area enclosing the foreground area. The secret pattern may be observed only a person who is informed as to what pattern he is looking for and how to look at that pattern. Particularly, his line of sight must make a certain angle with the plane of the impressed substrate. The line of sight must also be oriented properly with respect to the background and foreground areas.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: December 29, 1987
    Assignee: American Bank Note Company
    Inventors: Richard L. Roule, Joshua C. Cantor