An electric-current biosensor has first and second supports, a pair of positive and negative electrodes on the first supports, an activity area covers the positive and negative electrodes, a pair of testing ports on two sides of the second support, and an electrode film mating with the activity area....http://www.google.fr/patents/US7081188?utm_source=gb-gplus-shareBrevet US7081188 - Electric-current biosensor
