1818LESER is founded as a brass foundry in Hamburg-Neustadt by Georg Wittmann.
1856John Ramsbottom invents a flanged spring safety valve.
1884LESER offers the complete product range of steam fittings, including safety valves.
1914The company expands and acquires the property in Wendenstraße.
1943Production is moved to Hohenwestedt.
1944André Ramseyer AG is founded in Flamatt / Switzerland, in which LESER holds a share.
1959The first component test is carried out and successfully completed.
1970LESER specializes in safety valves.
1980LESER is market leader in the field of safety valves in Germany and Europe.
1987FAINGER-LESER is founded in Mumbai / India as a joint venture.
1990LESER receives the first ASME certification and can thus operate worldwide.
1998Protego LESER do Brasil is founded in Brazil.
2001LESER introduces the API product group as an important step towards a global presence.
2003LESER LLC is founded in Charlotte, NC / USA.
2004LESER S.A.R.L. is founded in France.
2008LESER Middle East is founded as an office in Bahrain.
2010LESER introduces the pilot operated safety valve.
2010LESER LLP is founded in Singapore.
2013LESER - The Safety Valve (Tianjin) Ltd. is founded in Tianjin, China.
2017 LESER introduces the change-over valve.
2018200 years of LESER
2021Undertaking LESER Poland