US Patent 7658618 Electric connector

An electric connector provided with a plurality of connecting elements which electrically connect a first electrode group and a second electrode group opposite between two devices, wherein (a) first contact points in contact with electrodes of the first electrode group of the connecting elements correspond to intersection points on an a×b where a and b correspond to pitch size, and (b) second contact points in contact with electrodes of the second electrode group of the connecting elements form at least two groups.