ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,451, issued on March 31.
"Ledger board system" was invented by Michael D. Schuler (Hamburg, N.Y.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ledger board for use in constructing a structural extension on an existing structure has a monolithic body that extends along a longitudinal axis and is attachable to one or more structural members of the existing structure. The monolithic body includes an inner attachment surface for engaging the existing structure and has a cross-sectional configuration defining an upper flashing portion having an outer surface, an upwardly open gutter conduit extending along the longitudinal axis below the flashing por...