Patent ID: 7432472

Claim:
An elongated flooring board comprising: a tongue and a groove extending along the elongated flooring board, for joining the flooring board to at least one adjacent, identical flooring board; at least one covering layer; a base plate supporting the at least one covering layer; and an embedded sheet which is provided between the base plate and the at least one covering layer and which includes electrical connecting means attached to the tongue and the groove for obtaining an effect upon the sheet via a connected electric voltage, wherein the electrical connecting means comprises: (i) a first type of connecting means including a first portion located along an under side of the groove and a second portion located along an upper side of the tongue, the first and second portions of the first type of connecting means being connected via at least one line, and (ii) a second type of connecting means including a first portion located along an under side of the tongue and a second portion located along an upper side of the groove, the first and second portions of the second type of connecting means being connected via at least one line.