Mediaphon (for copyrights use only – this is the short name used in legal notices by Mediaphon GmbH, aka Mediaphon-Musikproduktion und Verlag GmbH)

The name Mediaphon is commonly used/seen in release copyright notices, in place of its real name Mediaphon-Musikproduktion und Verlag GmbH; founded in 1980 by Dr. Udo Unger and was based in Stuttgart, Germany. In January 1994, Madacy Entertainment Group, Inc. acquired 100 percent of the stock, and it subsequently was renamed on 1997-03-05 as Mediaphon-Madacy Entertainment (Mediaphon-Madacy Entertainment GmbH)

for start/end dates, see https://musicbrainz.org/edit/50562433