Case C-351/08: Judgment of the Court (Fourth Chamber) of 12 November 2009 (reference for a preliminary ruling from the Bundessozialgericht, Germany) — Christian Grimme v Deutsche Angestellten-Krankenkasse (Freedom of movement for persons — Member of the managing board of a company limited by shares governed by Swiss law, director of a branch in Germany — Compulsory membership of the German pension insurance scheme — Exemption from that obligation for members of managing boards of companies limited by shares governed by German law)