Ratteler, Copyrights held by corporations, (including work-for-hire, anonymous & pseudonymous works), fall into the PD the same way they do for any individual. The timespan is dependent on the date of creation. As an example, anything created on or after 1-1-78 falls become public domain either 120 years after creation or 95 years after publication (whichever is shorter) Most of the Coca-Cola stuff referred to in this thread, falls under trademark laws (logos, script, "the wave", bottle shape, etc), & with proper care can be renewed virtually forever.