Patents Assigned to Lennart Dahlgren
  • Toy kit of stackable geometric shape pieces to form a structure
    Patent number: 5460561
    Abstract: A toy kit for forming a structure. Individual pieces include at least a cylinder, cone, cube and prism, and at least one additional piece. The piece can be assembled to form a structure, e.g. a sand castle. The pieces are hollow and open bottomed and include fixtures enabling mutual assembly together. Holes in their top walls permit passage of water or sand.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: October 24, 1995
    Assignee: Lennart Dahlgren
    Inventor: Britt Dahlgren