Patents Assigned to Wilbur E. Tolliver
  • Method of making reinforced concrete pipe
    Patent number: 4079500
    Abstract: Method of reinforcing concrete pipe in a rotary molding method using a wire reinforcing cage having a helical strand disposed about its exterior to resist torsional forces on the cage during molding, the cage being formed from a flat sheet.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: March 21, 1978
    Assignee: Wilbur E. Tolliver
    Inventor: Wilbur E. Tolliver