Patents by Inventor John Leskovec, Jr.

John Leskovec, Jr. 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).

  • Means for incorporating multiple first days of issue stamps
    Patent number: 4012857
    Abstract: A means for placing multiple first day of issue stamps, postmarks, description, the words "First Day of Issue" and art work on a sheet of paper, sheets of paper or a roll of paper. The paper can be fan-folded or rolled.
    Type: Grant
    Filed: December 17, 1975
    Date of Patent: March 22, 1977
    Inventor: John Leskovec, Jr.