Karl Elsener (inventor) his grandson Carl Elsener senior (1922-2013) and his great-grandson Carl Elsener Jr. (born 1958) led the Victorinox company. Karl Elsener (inventor) Karl Elsener (9 October 1860 - 26 December 1918) was a Swiss cutler, inventor and entrepreneur. Karl Elsener completed an apprenticeship as a knife maker in Zug. After some journeyman years he opened a factory in Ibach, Switzerland in 1884 for the manufacture of knives and surgical instruments. He invented the Swiss army knife in 1891 and developed his knife manufacturing company into what has become Victorinox. From 1912 to 1918 Elsener was a member of the cantonal parliament
Karl Wilhelm von Kupffer from Jagellonian University in Krakow, correctly identified them as macrophages. Karl Wilhelm von Kupffer Karl Wilhelm von Kupffer (14 November 1829 – 16 December 1902) was a Baltic German anatomist who discovered stellate macrophage cells that bear his name. He was the eldest son of pastor Karl Hermann Kupffer (1797-1860). In 1854, he obtained his medical doctorate from the University of Dorpat, where shortly afterwards he served as an assistant to Friedrich Heinrich Bidder (1810-1894). In 1856-57 he took a scientific journey to Vienna, Berlin and Göttingen, an extended trip in which he studied physiology with Emil Du Bois-Reymond (1818-1896)