Prince Henry of Prussia (1862–1929) became the club's patron. Henry was interested in motor cars as well and supposedly invented a windshield wiper and, according to other sources, the car horn. In his honor, the "Prinz-Heinrich-Fahrt" (Prince Heinrich Tour) was established in 1908, like the earlier Kaiserpreis a precursor to the German Grand Prix. Henry and his brother William gave patronage to the Kaiserlicher Automobilclub (Imperial Automobile Club). Henry also was an early proponent of introducing submarines and airplanes. He had merchant ships converted into seaplane tenders for operations in the Baltic Sea. Henry respected his brother, but this attitude was not returned in the
Prince Wilhelm Victor of Prussia Princess Viktoria Marina married William Patterson. Prince Wilhelm Victor married at Donaueschingen 20 July 1944 Marie Antoinette, Countess of Hoyos (Hohenthurm, 27 June 1920 – Marbella 1 March 2004), and had the following issue: The Princess was born Countess Marie Antoinette, at Hohenthurm, 27 June 1920, daughter of Friedrich, Count Hoyos-Sprinzenstein, Baron zu Stichsenstein and Wilhelmine von Wuthenau of the Counts Hohenthurm. Prince Wilhelm Viktor died on 7 February 1989 at age 69. Prince Wilhelm Victor of Prussia Prince Wilhelm Victor of Prussia ("Wilhelm Viktor Ernst Freund Friedrich Georg Adalbert") (15 February 1919 in Kiel, Schleswig-Holstein, 7 February 1989 in