Carl Elsener Sr. Carl Elsener Sr. Carl Elsener Sr. (also known as Charles Elsener, born 6 July 1922 in Ibach, † 1 June 2013 in Schwyz) was a Swiss entrepreneur. Carl Elsener was the grandson of Karl Elsener (1860-1918) and the son of Carl Elsener (1886-1950). Karl Elsener had opened a factory in Ibach for the production of knives and surgical instruments, from which the knife factory Victorinox developed. Carl Elsener led the company initially with his father and his brother Eduard Elsener (b. 1926). After the death of his father in 1950, he took over the management. The Swiss Army Knife is
Karl Spiro of physical chemistry at the University of Basel, where he also served as director of the institute for physiological chemistry. In 1897 he invented "Pyramidon", the trade name for aminopyrine. With Arthur Stoll, he is credited with the isolation of ergotamine. His name is associated with "Spiro's test"; a test for the determination of ammonia and urea in the urine through the use of barium oxide and petroleum. Karl Spiro Karl Spiro (June 24, 1867, Berlin – March 21, 1932, Wimmenau) was a German biologist, and physical chemist. In 1889 he received his PhD from the University of Würzburg as