Under the general international rule of life + 50 it went into the public domain on January 1, 1996.
According to the Wikipedia article on the book, the copyright (owned
by
the state of Bavaria) doesn't expire until December 31, 2015. Life
plus
70 years?
Yes, I think that's what German copyright law says.
Or do the Brazilian clones figure into this? ;)
You never know.
Kurt