(¤ 1874, † 1945) Johann Philipp Leonhardt Hauck, known as Leo, was born in Vach on May 29, 1874, the son of factory owner Philipp Hauck and his wife Margareta. He first attended the elementary school in Vach, then the Latin school in Fürth and the humanistic grammar schools in Nuremberg and Erlangen. He received his university entrance certificate there on July 14, 1893. In the winter semester of 1893/94, he began studying medicine in Erlangen and spent one semester each at the universities in Kiel (summer semester 1896) and Würzburg (winter semester 1896/97). On July 7, 1898, he received his doctorate in Erlangen and passed the state examination on February 9, 1899. After a few months as a trainee doctor at the Surgical Polyclinic in Erlangen, Penzoldt, at that time head of the Pharmacological Polyclinic Institute, employed Hauck as an assistant on April 1, 1900, initially at the Medical Polyclinic and from 1903 at the Medical Clinic, which Penzoldt had now become head of.
Hauck acquired his specialist knowledge in the field of skin and venereal diseases partly through self-study, but also partly through stays at other clinics. From April 1 to October 1, 1904, he was on leave to spend several months at the dermatology clinic in Munich and the clinics in Vienna. He also had the opportunity to study at the dermatology clinic in Breslau during this period.
In July 1905, Hauck habilitated with his thesis "On the behavior of leukocytes in stage II syphilis before and after the introduction of mercury therapy". On October 22, 1906, he was appointed senior physician at the new Department with Outpatient Clinic for Skin and Venereal Diseases at the Medical Clinic. He was awarded the rank of associate professor on December 24, 1910. Hauck did military service during the First World War. In a curriculum vitae, he describes his activities during this time: "In August 1914, I went into the field as a reserve staff physician, was first chief physician of a war hospital, then regimental physician of the 11th Bavarian Infantry Regiment for 7 months and from September 1915 until the end of the war chief physician of a field hospital." On August 1, 1921, Hauck was appointed Associate Professor of Skin and Venereal Diseases. A few years later, on February 1, 1923, he was appointed to the post of director of the new Clinic for Skin and Venereal Diseases and finally received the title and rank of full professor for his subject on March 21, 1924.
his subject. Hauck's retirement took place on September 30, 1939, but he took over his own chair until his death on November 1, 1945.