Thanks to comments on my earlier post, Copyright Duration and the Mickey Mouse Curve, I’ve been encouraged to reflect on what would happen if, in fact, Steamboat Willie had fallen into the public domain. Could we then reuse Mickey Mouse, the star of that show, without facing any liability to the Walt Disney Company? I drafted this answer for my book, Intellectual Privilege (here edited for blogging):
Scholars have made surprisingly strong arguments that Steamboat Willie, a cartoon that the Walt Disney Company cites as establishing its copyright rights in Mickey Mouse, has fallen into the public domain. As a thought experiment, let us assume the truth of that claim. What would happen if Walt Disney Company—if, indeed, nobody—held a copyright in Steamboat Willie? Certainly, each of use would by default enjoy complete freedom to copy, distribute, display, or perform the cartoon, because the expiration of the work’s copyright would also end the exclusive rights of the Walt Disney Company and its assigns the exercise those statutory privileges. So, too, would we escape copyright’s limitations on making derivative versions of Steamboat Willie—versions that might show Mickey standing at a lectern rather than at a pilot’s wheel, for instance, or have him expounding on copyright law.
The Walt Disney Company would retain its copyrights in later, plumper versions of the Mickey Mouse, of course. Contemporary artists wanting to reinterpret the character free from the company’s veto would thus have to draw inspiration primarily from the earlier, skinnier, version. Given that the characters would share a common ancestor, however, even mice derived solely from Steamboat Willie would often strongly resemble the modern-day Mickey Mouse.
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