The apparatus of claim 2 wherein the tapering structure comprises a non-uniform conical configuration. The apparatus of claim 1 wherein the tapering structure and the outwardly expanding structure each comprise corresponding conical configurations. An iontophoretic drug delivery apparatus comprising: an electrode assembly having an upper surface, an outer surface, a first interface and two electrical leads a power source having an inner surface, a second interface and two electrical contacts means for facilitating mating engagement of one of the first interface and the second interface into the other of the first interface and second interface, wherein the mating means includes a tapering structure associated with the outer surface of the first interface, wherein the tapering structure is wider at the upper surface, from which it depends, and means for facilitating mating engagement wherein the mating means includes an outwardly expanding structure associated with the inner surface of the second interface, to, in turn, enable slidable mated engagement between the first and second interface. 9439 Johnstown Alexandria Rd, Johnstown, OH 43031Ĥ284 Fairview Dr, Berkeley Springs, WV 25411ģ15 Rissington Psge, Alpharetta, GA 30004Ģ610 Mexican Hat Dr, Cedar Park, TX 78613ĥ663 Madison Square Blvd, Dublin, OH 43016Ĥ304 Knoll Crest Dr, Grove City, OH 43123
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