A surface mapping electrode set assembly is provided which includes a plurality of insulated, elongated wires, each of which terminates at a distal end head portion of the assembly. The electrodes of the mapping electrode set are generally arcuate portions of the wires, each generally arcuate electrode...http://www.google.ca/patents/US4690148?utm_source=gb-gplus-sharePatent US4690148 - Surface mapping electrode sets
