Patents by Inventor Vojtech Kopsky

Vojtech Kopsky 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).

  • Cube-like puzzle
    Patent number: D340093
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: October 5, 1993
    Assignee: Karel Hrsel
    Inventors: Karel Hrsel, Vojtech Kopsky
  • Three-dimensional puzzle
    Patent number: D353850
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: December 27, 1994
    Inventors: Karel Hrsel, Vojtech Kopsky