In other words, regardless of the Statute, there existed a perpetual copyright under the common law.

Now a perpetual copyright would be quite another matter.

Let her strike for a perpetual copyright on that book.

A woman desperately tries to convince a powerful senator to oppose perpetual copyright- because the fate of humanity is at stake.

If we can ever get this thing through Congress, we can try making copyright perpetual, some day.

I said there was property in ideas before Queen Anne's time; they had perpetual copyright.

Usually, special legislation is required, granting a perpetual copyright to a specific work.

Calls for perpetual copyright have been widely criticized.

Nevertheless calls for perpetual copyright continued in Britain and France until the mid-19th Century.

State and common law have granted perpetual copyright in certain special cases not covered by federal copyright law.