Lehr- und Versuchsanstalten, höhere#

Hoehere Lehr- und Versuchsanstalten, name of secondary schools of engineering, arts and crafts or agriculture and forestry which include research institutes. Their development is due to the "Exner law" (1910, named after the head of Technologisches Gewerbemuseum W. Exner), which allowed the issuing of certificates, acknowledged as public documents stating the results of research, tests and material tests.