| 1912 |
the BERNDT firm in Teplice - Řetenice established, |
| 1942 |
construction of the plant in Komořany launched, |
| 1943 |
production launched in the Komořany plant - established as Zentralwekstaff Kommern, a part of Sudetenlandischer Bergbau AG Brux, |
| 1945 |
both plants, each individually, taken over into the national administration, |
| 1950 |
a shop of heavy-current electrical engineering based in Most affiliated to the Komořany plant, |
| 1952 |
individual national enterprises founded from both plants; named as Ústřední dílny Komořany, n. p. (ÚDK), Ústřední dílny Řetenice, n. p. (ÚDŘ), |
| 1957 |
technical college in Litvínov affiliated to Ústřední dílny Komořany, n. p.; professional training for the whole North-Bohemian brown-coal field was held there, |
| 1958 |
a national enterprise of Ústřední dílny Komořany, n. p established with its plants in:
01 - Komořany,
02 - Řetenice,
03 - Duchcov (electric plant), and
04 - Litvínov (technical college), |
| 1960 |
development centre of mechanization and automation based in Most established; in 1971 the 08 plant was founded from the centre, |
| 1963 |
subsidiary of Přerovské strojírny based in Horní Slavkov near Sokolov affiliated to ÚDK, n.p. as the 05 plant. The production range of the plan was construction machinery, which was successfully exported, |
| 1968 |
enterprise named as Krušnohorské strojírny, n. p. Komořany, |
| 1968 |
the 03 plant in Duchcov shut down, production transferred into the 02 plant in Řetenice, |
| 1976 |
change of the enterprise status - from the national enterprise to the concern one, which was subordinated to the concern of Severočeské hnědouhelné doly, |
| 1982 |
technical college hived off Krušnohorské strojírny and directly subordinated to the SHD concern, |
| 1990 |
SHD concern came to end, Krušnohorské strojírny became an individual state-owned enterprise, |
| 1991 |
Krušnohorské strojírny included in the first wave of the coupon privatisation, for which 97% of shares was intended, |
| 1992 |
as of May 1, Krušnohorské strojírny became a joint-stock company, |
| 1993 |
August 5, first general meeting of Krušnohorské strojírny was held in the presence of shareholders arisen from the coupon privatisation. |
| 1994 |
the 08 plant shut down, |
| 1999 |
transformation of the Teplice plant into the Teplice production shop, |
| 2000 |
the Teplice production shop shut down - affiliated to the Komořany plant, |
| 2002 |
on February 1, the Regional Court in Usti nad Labem declared Krušnohorské strojírny, a.s. bankrupt. Our production was maintained. |
| 2002 |
Appian Group, an American company which has bought Krušnohorské strojírny, a.s., through VARIMATIK, a.s., becomes its new owner. |
| 2005 |
17 May, the new name of the parent company came into force. Appian Group a.s. was renamed to Czech Coal a.s.
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