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Our Intellectual Property Law Firm Neumann Müller Oberwalleney & Partner Patent Patentanwälte (NMO) has its origin in the practice Harwardt Neumann in Siegburg, which was established in 1984 by the Patent Attorneys Günther Harwardt and Ernst D. Neumann, which further expanded in the following twenty years. In the context of the change of generations, caused by the retirement of the company's founder Günther Harwardt from active office life, all Patent Attorneys of the former law firm founded the present office NMO in 2007. In 2008 the office moved to Cologne, where also foreign clients can reach us quickly and easily because of the central location and advantageous public transport connections.