Patents Assigned to John D. Cronin
  • Method and apparatus for insulating structures
    Patent number: 5960594
    Abstract: A self-contained device for filling voids in structures with insulating material is described. In particular, the present invention is useful for filling the weight pockets adjacent to windows in older buildings.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: October 5, 1999
    Assignee: John D. Cronin
    Inventor: John D. Cronin