Customers Institutions Court of Justice of the European Union EFTA-Court German Courts and Public Prosecutors Federal Centre for Health Education (Bundeszentrale für gesundheitliche Aufklärung) Federal Flat Glass Association, a registered association (Bundesverband Flachglas e.V.) and Multi-Pane Insulating Glass Quality Association, a registered association (Gütegemeinschaft Mehrscheiben-Isolierglas e. V.) Corporations AmpegaGerling Bauwens RWE STRABAG various medium-sized local companies as well as solicitors and law firms, notaries, tax consultants, banks and savings banks and, of course, private customers.