Patents Assigned to Curt Holger Ingestrom
  • Building block
    Patent number: 4130973
    Abstract: In a building block of cement-stabilized elastic granulate there are provided blind holes which are filled with a heat-insulating material.
    Type: Grant
    Filed: September 7, 1977
    Date of Patent: December 26, 1978
    Assignee: Curt Holger Ingestrom
    Inventor: Stig O. S. Gustavsson