The office was initially known as ATP Achammer Tritthart Fröhlich (ATF) and subsequently, after the death of Gunther Fröhlich in 1986, as AT Achammer Tritthart Generalplaner.
Das Büro nannte sich in der Folge ATP Achammer Tritthart Fröhlich (ATF), nach dem Tod von Gunther Fröhlich ab 1986 AT Achammer Tritthart Generalplaner.