Friedrich Heinrich Philipp Franz von Hefner-Alteneck (April 27, 1845 in Aschaffenburg – January 6, 1904 in Biesdorf near Berlin) was a German electrical...

extracting gold from its ores (22 March 1898) Friedrich von Hefner-Alteneck—one of Siemens's aides Werner von Siemens Ring Award German inventors and discoverers...

The Hefner lamp, or in German Hefnerkerze, is a flame lamp used in photometry that burns amyl acetate. The lamp was invented by Friedrich von Hefner-Alteneck...

then an improved differential arc lamp had been developed by Friedrich von Hefner-Alteneck of Siemens & Halske. The United States was quick in adopting...

generator and the other as motor. The drum rotor was introduced by Friedrich von Hefner-Alteneck of Siemens & Halske to replace Pacinotti's ring armature in...

(1864–1941), ⚭ 1884 married Arnold von Siemens (1853–1918), and Friedrich Julius von Helmholtz (1868–1901). In December 1899, Anna died while on vacation...

Joseph von Lindwurm (1824–1874), physician and dermatologist Lujo Brentano (1844–1931), economist and social reformer Friedrich von Hefner-Alteneck (1845–1904)...

(AEG) in Berlin commissioned Friedrich von Hefner-Alteneck, an electrical engineer, to develop such a device. Hefner-Alteneck then designed the Mignon, an...

1821) January 7 Parke Godwin, American journalist (born 1816) Friedrich von Hefner-Alteneck, German engineer (born 1845) Emmanuel Rhoides, Greek writer...

died of diphtheria. Parke Godwin, 87, American journalist Friedrich von Hefner-Alteneck, 58, German engineer Hippolyte Auguste Marinoni, 80, French...