Patents Assigned to Parker Limited
  • Roof structure
    Patent number: 4856236
    Abstract: Structure for use on a roof consisting of a plurality of standard elements in the general form of planks that lock together which are formed with a dense outer impermeable skin and a lightweight insulating interior.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: August 15, 1989
    Assignee: Parker Limited
    Inventor: Geoffrey C. Parker