[BjoernKW]

Under German law copyright is non-transferrable.

However, the copyright holder can grant another party unlimited usage rights as well as waive the right to be mentioned as the actual copyright holder.

Both of these might apply here: SAP's and Deutsche Telekom's employees most likely have waived their right to be mentioned as individual copyright holders (which is a common stipulation in German employment contracts) while SAP and Deutsche Telekom have not, which is why they are mentioned as copyright holders instead of the Federal Republic of Germany.

[legulere]

You shouldn’t really call the German Author’s Rights Copyright, because it works dirfferently

[raverbashing]

I think the term in English is "Moral Rights" (Urheberpersönlichkeitsrecht in German but for some weird reason they're apparently different)

[BjoernKW]

The legal system is different. However, copyright is the closest common law approximation.