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Patentanwalt Dr. Kasche serves Swiss and international clients before the European and German patent and trademark offices (EPO, EUIPO, DPMA). Kasche & Partner AG, previously Ritscher & Partner AG, serves clients before the Swiss national Patent and Trademark Office (IGE). Ritscher & Partner AG was formed as a successor to Ritscher & Seifert, founded in 1970 by Thomas Ritscher † and Helmut E. Seifert †.