I am growing more and more convinced that copyright protection period should not be else than the author's lifetime - if not less - ever.And further, copyright should not be considered as 'transferrable property' (I mean that the author could choose to declare 'a product' as pd, perhaps to rent out or to licence it temporarily to someone else, but NOT to SELL it away). So the author, always, would be the one to say the final word whether her/his 'intellectual property' can or can not be used without paying royalties.
wishful thinking, I know, but still ...
AKS, Joensuu, Finland