After his death, his widow Edith Zimmermann (1900-1975) did not receive a license from the Soviet military authority to continue publishing and the firm was formally confiscated by the East German authorities.Die Musik in Geschichte und Gegenwart, Kassel 2007 She reached the west, and established the company in Frankfurt. She extended the catalogue with new, young composers and educational publications. When she died in 1975, she had rebuilt a world-renowned venture. Her daughter Maja-Maria Reis (1929-2000) became managing director. Due to her foresight, the company joined with Robert Lienau in 1991. Today the Zimmermann catalogue presents about 3,000 books, including copyrights by Keiko Abe, Siegfried Behrend, Cesar Bresgen, Siegfried Fink, Kurt Hessenberg, Paul Juon and Graham Waterhouse, among others.
