− | *EP0659099 (US5573552 / DE3335849A), "ELECTROMEDICINAL APPARATUS FOR INTERFERENCE CURRENT THERAPY", 31. Januar 1996, inventor: Hansjürgens, Achim. | + | *EP0659099 (US5573552 / DE3335849A), "ELECTROMEDICINAL APPARATUS FOR INTERFERENCE CURRENT THERAPY", 31. Januar 1996, inventor: Hansjürgens, Achim. [http://www.google.com/patents/EP0659099B1?cl=de] |