Hartmann & Braun AG
1879 - 1999
The company was founded by Eugen Hartmann in 1879 in Würzburg as "optische Anstalt, physikalisch astronomische Werkstätte". In 1882 Wunibald Braun, brother of physicist Ferdinand Braun became an associate, and in 1884 the company moved to Frankfurt. In 1901 the company was incorporated (hence the AG).
In the early years the company specialized in electrical measurement where it made several important innovations including graphical registers. After 1930 it entered the field of control equipment and after the Second World War, the field of automatization.
The company was partly owned by AEG since 1968. AEG's share was sold to Mannesmann in 1981. In 1995 Mannesmann sold Hartmann & Braun to Elsag Bailey, which was taken over by ABB in 1999. ABB absorbed the company to its operation.
In the early years the company specialized in electrical measurement where it made several important innovations including graphical registers. After 1930 it entered the field of control equipment and after the Second World War, the field of automatization.
The company was partly owned by AEG since 1968. AEG's share was sold to Mannesmann in 1981. In 1995 Mannesmann sold Hartmann & Braun to Elsag Bailey, which was taken over by ABB in 1999. ABB absorbed the company to its operation.
For a short history in English, see "History of the radio manufacturer Hartmann & Braun AG; Frankfurt," Radiomuseum, http://www.radiomuseum.org/dsp_hersteller_detail.cfm?company_id=5640 (accessed 12/04/2014) [unvetted]
For more details on this company (in German), see the description of its archive at the Institut für Stadtgeschichte, Frankfurt am Main, http://www.stadtgeschichte-ffm.de/abteilungen/abteilung_3/03701inhalt.html#a24 (accessedc 12/4/2014)