Treaties — Termination of treaties — By operation of law — Outbreak of war — Madrid Agreement for the Registration of Trademarks, 1891 — Collapse of German Reich in 1945 — German Patent Office ceasing to function between 1945 and 1949 — Whether German State remaining a party to the treaty — Whether treaty suspended — Effect of declaration by Federal Republic of Germany that Germany had been a party to the treaty without interruption since 1922 — Effect of different attitude of German Democratic Republic — Whether Federal Republic of Germany successor to international obligations of German Reich — The law of the Federal Republic of Germany