Re: New Encryption System for Music (nytimes)

[Tom Vogt]

Vin McLellan wrote:
> > >         In the US, at least, no copyright held by a corporation has
> > been given
> > > over to the public domain since WWI -- and, Tom's suggestion to the
> > > contrary, there were many of them in corporate hands even then;-)
> 
> >are there any sources for this?
> 
>          None I have readily available, but any real copyright expert
> should be able to confirm it.

I wasn't doubting it, but I'd love to have  reference for that to use in
further discussions of the topic.