Description: Patent for an improvement in Bridges and Self-Supporting Roofs and Girders. The invention provides instruction for "the construction of truss-bridges and self supporting roofs and girders"..."by nailing or bolting securely together successive layers of plank joined at different points."
Date: May 26, 1873
Creator: Davis, Benjamin F.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department