3M, Germany
ADAC Allgemeiner Deutscher Automobil Club, Germany
Annahütte Stahlwerk, Germany
Bayernoil, Germany
BMW AG, Germany
Bridgestone Corporation, Germany
Bundespresseamt Berlin, Germany
Busch Filmlicht, Germany
CentrO Management, Germany
Cirrus Airlines, Germany
Congress Centrum Mainz GmbH, Germany
Cordes & Simon Systemverkehr GmbH & Co.KG, Germany
Daimler Chrysler AG, Germany
DaimlerChrysler AG, NL Köln, Germany
Design Zentrum Nordrhein Westfalen, Germany
Deutsche Bundeswehr, Germany
Deutsche Telekom AG, Germany
Dirostahl, K.Diederichs, Germany
DPD Geopost, Germany
DSL Dienstleistungsp., Germany
Gasometer Oberhausen, Germany
Gegenbauer Sicherheitsdienste GmbH, Germany
GELSENWASSER AG, Germany
Goethe-Institut, Germany
Hochbauamt München, Germany
ICM, Germany
John Deere, Germany
Karstadt Hertie, Germany
Kodak Polychrome Graphics GmbH, Germany
Kölnarena Management, Germany
Marriott Hotel Sindelfingen, Germany
Membrana, Germany
Messe Berlin, Germany
Messe München, Germany
NBI Security GmbH, Germany
Phantasialand Brühl, Germany
RheinEnergie AG, Germany
Rheinkalk GmbH, Germany
Rolls-Royce Deutschland
Ruhruniversität Bochum, Germany
Schenker Spedition, Germany
Sear GmbH, Rostock
Seidel Stahlrohr GmbH, Monheim
Seissenschmidt AG, Plettenberg
Silit-Werke, Germany
Siemens AG, Düsseldorf/Germany
Siemens Building Technologies, Germany
SSM Euromicron GmbH, Zwenkau
Steag AG, Gelsenkirchen/Germany
ThyssenKrupp, Germany
Toyota, Germany
Wal Mart, Germany
WDR Gebäudemanagement, Germany