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Qnective AG publishes telecommunications software. The firm offers homeland security systems, business communication services to the defense and government sectors. The company was founded by Oswald Ortiz in 2007 and is headquartered in Zurich, Switzerland.

Viessmann Climate Solutions SE engages in the production of heating, industrial, and refrigeration systems. Its product portfolio includes gas-condensing, oil, and wood boilers, as well as photovoltaic systems and domestic hot water tanks. The company was founded in 1917 and is headquartered in Allendorf, Germany.

Biodata Systems GmbH provides network, computer, communications technology products, and information technology security systems. The company is based in Frankenberg, Germany, and has subsidiaries in Germany.

Messe Frankfurt GmbH operates as a holding company which specializes in the organization of exhibits. The firm focuses on the consumer goods and leisure, textiles and textile technology, technology and production, mobility and logistics, as well as the entertainment, media and creation sectors. The company was founded on November 22, 1907 and is headquartered in Frankfurt, Germany.

Bio-Data GmbH provides environmental planning and conservation management services. It provides services in the areas such as landscape planning, nursing management, botany and faunistics sectors. The company was founded by Tan Siekmann in 1990 and is headquartered in Mainz, Germany.

Viessmann Refrigeration Systems Oy provides commercial refrigeration solutions. Its products include remote and plug-in refrigeration cabinets, lamella products, power packs, cold rooms, refrigeration cells and units, as well as accessories and services for pre- and post-installation. The company serves the food and beverage industry, food retailers, and shopkeepers. Viessmann Refrigeration Systems was founded by Reijo Mäntyoja in 1953 and is headquartered in Porvoo, Finland.

Viessmann Manufacturing Co. (US), Inc. distributes water heaters and boilers in North America. It provides different types of products such as wall-mounted condensing boilers, oil-fired boilers, gas-fired boilers, commercial boilers, indirect-fired domestic hot-water tanks, dual heat exchanger coils, and controls and accessories. The company was founded in 1917 and is headquartered in Warwick, RI.

KMO Kestler Mielert Otto provides competent legal and tax advice in all business and financial affairs. It provides investments, business, stock exchange, corporate, mergers and acquisitions law, capital markets, real estate, and notarial services. The company was founded by Hubertus Kestler, Tomas Mielert, & Hans-Joachim Otto and is headquartered in Frankfurt am Main, Germany.

Burg Lichtenfels GmbH & Co. KG develops and markets telecommunication security products for IT infrastructures. The private company is based in Lichtenfels, Germany.

Part of Viessmann Climate Solutions SE, HBB Hotelbetriebsgesellschaft Battenberg GmbH is a hotel management company based in Battenberg, Germany. The German company manages the Sonne Frankenberg hotel, which has a long tradition of providing a feel-good ambience and excellent service. The hotel is part of the Collection of Fine Private Hotels, which is known for its lived hospitality and exceptional service. The company's CEO's are Gerhard Pohl, Joerg Lenz, Martin Viessmann. The hotel also offers first-class restaurants in Hesse, where guests can enjoy culinary delights.

Viessmann Werke Allendorf GmbH specializes in the manufacture and development of industrial heating systems. Its product encompasses condensing boilers, pumps, exchagers, and combustion systems. The firm also provides design system technologies and components for wood combustion, and oil and gas condensing applications. The company is headquartered in Allendorf, Germany.

Scopas Medien AG produces animated and related videos. The private company is based in Frankfurt, Germany. The German company was founded in 1993. The CEO is Jan Bonath.

The Viessmann Group is engaged in manufacturing heating and cooling systems. It offers investment, real estate, climate, refrigeration and industrial solutions. The company was founded by Johann Viessmann in 1917 and is headquartered in Allendorf, Germany.