| 1944 | The company Walter Krämer GmbH is founded by Walter Krämer in Daaden | ![]()
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| 1956 | The predecessor company Schuster & Beck moves from the town centre (Rain) to the present day location in Donauwörther Straße | |
| 1961 | Construction of a second production building in Rain | |
| 1969 | Acquisition of Schuster und Beck in Rain am Lech by Walter Krämer GmbH | |
| 1970 | Start of operations in Rain as Apparatebau Biersdorf Walter Krämer GmbH | |
| 1972 | Enlargement and structural alterations to the production buildings | |
| 1977 | Demolition and reconstruction of the oldest building, enlargement of the second building and installation of a craneway | |
| 1982 | Construction of the new, third building | |
| 1984 | Construction of the present day administration building | |
| 1994 | Construction of the new paintshop and sandblasting building | |
| 1999 | The entire group of companies is renamed Walter Krämer Industrieanlagen | |
| 2003 | The plant in Rain am Lech is hived off and renamed Krämer GmbH Industriebehälter | |
| 2010/11 | Demolition and reconstruction of a building with modern personnel rooms and foremen's offices |



