Patent number 7,204,196 was issued to Charles Coles with the following abstract:
"A hydrofoil craft, particularly a method of economically modifying a conventional hull with cambered foils to obtain and calculate increased lift from dense spray and to achieve enhanced craft performance is disclosed. The present invention improves speed, fuel efficiency and rough water stability, reduced pitch and vertical accelerations. A catamaran or V-bottom hull is modified with chine mounted aerofoils, flexible dihedral cambered foils positioned beneath the water line and on either side of the bow so as to create turbulence in the forward end of a tunnel(s). Tunnels are created on the V-bottom hull by the chine mounted aerofoils. Fixed forward tunnel cambered foil(s) and/or fixed or adjustable center tunnel cambered foils at the stern end of the tunnel to generate lift from pressure caused by dense spray in the tunnel(s) may also be provided. Adjustable cambered stern foils are mounted on the transom end of the tunnels."
Patent number 6,895,883 was issued to Charles Coles with the following abstract:
"A hydrofoil craft, particularly a method of economically modifying a conventional hull with cambered foils to obtain and calculate increased lift from dense spray and to achieve enhanced craft performance is disclosed. The present invention improves speed, fuel efficiency and rough water stability, reduced pitch and vertical accelerations. A catamaran or V-bottom hull... is modified with chine mounted aerofoils... flexible dihedral cambered foils positioned beneath the water line and on either side of the bow... so as to create turbulence in the forward end of a tunnel(s).... Fixed forward tunnel cambered foil(s)... and/or fixed or adjustable center tunnel cambered foils at the stern... end of the tunnel... to generate lift from pressure caused by dense spray in the tunnel(s)... may also be provided."
Patent numbers 4,896,621(January) and 4,951,591(August) were issued to Charles Coles with the following abstract:
"Hydrofoil craft, particularly a method of economically modifying a conventional hull by means of foils to obtain enhanced lift and rough water stability. The method is characterized by defining an axial tunnel(s) intermediate the bow and transom of a catamaran hull or V-bottom hull modified with chine mounted aerofoils; positioning a flexible dihedral foil beneath the water line and on either side of the bow so as to obstruct and create a turbulence in the forward end of the tunnel, while cushioning shock and lifting the bow; and simultaneously enclosing the transom end of the tunnel with a foil, so as to compress the turbulence and lift the transom."
Patent Number 3,604,384 was issued to Charles Coles with the following brief abstract:
"The present invention relates to a boat including a hull having an inboard tunnel and foils with dihedral surfaces coacting with the tunnel at both the bow and stern."