Sigvard Oscar Fredrik, Prince Bernadotte, Count of Wisborg (7 June 1907 – 4 February 2002) born as, and until 1934 known as, Prince Sigvard of Sweden, Duke of Uppland, was a member of the Swedish Royal Family and a successful industrial designer by profession. He was the second son of the future King Gustaf VI Adolf and his first wife, Princess Margaret of Connaught, eldest daughter of Prince Arthur, Duke of Connaught and Strathearn and granddaughter of Britain's Queen Victoria. He was a Prince of Sweden from birth, but was excluded from the line of succession in 1934 when he married a woman of unequal rank, a violation of provisions prohibiting marriages between a Prince and a "private man's daughter" (), in force at the time, contained in both the 1809 Instrument of Government and the 1810 Act of Succession, and, in addition, he lost his princely and ducal titles as decided by the King in Council. As per the king's wishes he was then to be called only Mr. Sigvard Bernadotte in Sweden. In 1951 he was granted Luxembourgian titles of nobility, the interpretation of which remained a point of contention with the Royal Court for the rest of his life, Bernadotte having formally declared in 1983 that his title was Prince Sigvard Bernadotte. He was a paternal uncle of King Carl XVI Gustaf of Sweden and a maternal uncle of Queen Margrethe II of Denmark and Queen Anne-Marie of Greece. Professional life An industrial designer, Bernadotte was known for designing everything from luxurious silver objects for Georg Jensen to everyday-use household items in plastic. Among his iconic designs were the Red Clara opener; EKA Swede 38 folding knife; the Margrethe bowl – named for his niece Queen Margrethe II of Denmark; the Bernadotte jug, and the Facit Private typewriter. He also designed glasses frames. He worked as an assistant director at MGM in Culver City, California and served as a technical advisor on the 1937 film The Prisoner of Zenda. He appeared briefly in the 1968 Italian mondo film Sweden: Heaven and Hell. His work in industrial design at Bernadotte Design AB is featured, along with select items from his portfolio. Marriages He married Erica Maria Regina Rosalie Patzek (1911–2007) on 8 March 1934. She was the daughter of German businessman Anton Patzek and his wife Maria Anna Lála. The wedding took place in Caxton Hall in London