| 1879 | Paul Lechler gründet die gleichnamige Firma als Handelshaus für technische Produkte. | |
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| 1893 | Lechler erwirbt ein Patent für Flüssigkeitszerstäubungsdüsen und verkauft in der Folgezeit auch diese Produkte. | |
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| 1915-1919 | Lechler beginnt an den Standorten Stuttgart-Berg, Stuttgart-Bad Cannstatt und Stuttgart-Stammheim mit der Eigenfabrikation. | |
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| 1933 | Verlagerung der Düsenfertigung nach Stuttgart-Bad Cannstatt, in einen Erweiterungsbau der Dichtungsringfabrik. | |
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| 1950 | Ab 1950 wurden verstärkt Düsen für die Staubbekämpfung im Bergbau sowie für die Walzenkühlung und Entzunderung in der Stahlindustrie entwickelt und verkauft. | |
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| 1958 | Verlagerung der Produktion von Bad Cannstatt nach Feuerbach. | |
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| 1962 | Gründung von Vertriebsbüros in Deutschland. | |
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| 1967 | Erwerb und Ausbau der vormaligen Tuchfabrik Joh. Braun in Metzingen und Verlagerung der Produktion von Feuerbach dorthin. | |
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| 1972 | Erwerb der Fa. Kershaw, Hughes & Partners Ltd. in Sheffield/England, der heutigen Lechler Ltd.. | |
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| 1973 | Sämtliche Lechler-Firmen konzentrieren ihre Vertriebs- und Verwaltungsaktivitäten in dem neu errichteten Lechler-Haus in Fellbach. | |
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| 1975 | Lechler erwirbt Anteile der Fa. Spray Engineering Co. in USA. | |
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| 1977 | In Paris wird die Fa. Vollet übernommen, die heutige Lechler France S.A. | |
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| 1978/1979 | Lechler erwirbt 100 % der Spray Engineering Co. Umfirmierung in Spraco Inc. | |
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| 1986 | Umzug der Spraco Inc. nach St. Charles, Ill. und gleichzeitige Umfirmierung in Lechler Inc. | |
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| 1988 | Ergänzung des Düsenprogramms für Umwelt- und Entschwefelungstechnik durch den Vertrieb von Abscheiderprofilen und kompletten Abscheiderkassetten. | |
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| 1992 | Gründung von Lechler AB, Schweden. | |
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| 1993 | Gründung von Lechler India Pvt. in Thane, nahe Bombay. Gründung von Lechler KFT in Kecskemet/Ungarn. | |
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| 1995 | Verlagerung von Vertrieb und Verwaltung von Fellbach nach Metzingen. Erstmals in der Unternehmensgeschichte sind nun alle Funktionen an einem Standort vereint. | |
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| 1996 | Gründung von Lechler S.A. N.V., Belgien. | |
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| 1999 | Gründung Lechler S.A., Spanien. | |
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| 2002 | Umfirmierung der Lechler GmbH + Co KG in Lechler GmbH. | |
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| 2003 | Gründung Lechler Oy, Finnland. | |
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| 2004 | Gründung Lechler China. | |
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| Heute | Lechler ist heute eine Unternehmensgruppe mit weltweit 660 Mitarbeitern und einem konsolidierten Gesamtumsatz von ca. 100 Mio. Euro. Die zehn Auslandstöchter, von denen vier eigene Produktionsbetriebe unterhalten, sind unter der Lechler International GmbH zusammengefasst. | |