Patents Assigned to Roth Bros. Inc.
  • Roof expansion joint
    Patent number: 4005555
    Abstract: A roof expansion joint for flat built up roofs forms an elevated elongated structure bridging an expansion slot-like opening between adjacent roof sections to provide a movable watertight seal therebetween formed of rigid slideably engaged members.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: February 1, 1977
    Assignee: Roth Bros. Inc.
    Inventors: Abraham H. Roth, Dave Roth