Patents by Inventor Alexander G. Ignatiev

Alexander G. Ignatiev 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).

  • Cylindrical labyrinth puzzle toy
    Patent number: 5884912
    Abstract: A thing for amusement related to a puzzle or maze which has cylindrical body with a labyrinth's relief. The labyrinths Picture may be changed by revolving and rearranging the cylindrical sections (11). Cylindrical labyrinth has one or more guide-rings (40), (50) for leading guide-element (41), (51) along the chutes (25) from start to finish point. Guide-rings have catch elements (42), (52) for joining each other.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: March 23, 1999
    Inventor: Alexander G. Ignatiev