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 Henry of Prussia (1900–1904) newborn Prince immediately received the title Prince of Prussia with the style "Royal Highness", and was baptised "Heinrich Viktor Ludwig Friedrich". His older brothers were Prince Waldemar, a namesake of his uncle, and Prince Sigismund, a namesake of his other deceased uncle. Heinrich was named in honour of his father. The Prince was diagnosed with haemophilia as a young child, but, despite this, was a very cheerful and lively boy who liked to play a lot. As Henry grew older he became more aware of his condition. On 25 February, Princess Irene left Heinrich unsupervised for a few minutes while