Patent ID: 7788871

Claim:
A flooring, which comprises rectangular floorboards with first and second pair of opposed sides, said floorboards being joined in a pattern, wherein said first pair of sides have pairs of opposing first mechanical connectors comprising a tongue and a tongue groove for locking-together said floorboards vertically, and wherein said flooring on said first pair of sides further comprises second mechanical connectors comprising an upwardly projecting locking element on one side of the first pair cooperating with a locking groove on the other side of the first pair of an adjacent floorboard for locking together said floorboards horizontally, whereby said first and second mechanical connectors allow locking-together both horizontally and vertically by inward angling whereby the tongue is received in the tongue groove and the locking element enters the locking grove, wherein the pattern is formed of two types of floorboards, each type of floorboard comprising a material from a different genus, wherein at least one of the sides of the second pair of opposed sides of the floorboards is provided with third mechanical connectors, wherein said first mechanical connectors extends continuously along an entire length of said first pair of sides, said second mechanical connectors extend continuously along an entire length of said first pair of sides, and the third mechanical connectors extends continuously along an entire length of said second pair of opposed sides.