1945 - 'Jenaer Glaswerk Schott & Gen' is formed from 'Glastechnisches Laboratorium Schott & Genossen', which was the predecessor for 'Schott Glaswerke AG', which had been forced to relocate to Mainz. 1989 - 'Jenaer Glaswerk Schott & Gen' is taken over by 'Schott Glaswerke AG', which moves back to Jena and is then one company.