120 years.
Pulled that number out of your...
Copyrights are good for the life of the author plus 70 years.
Or in the case of multiple authors, it's the life of the last surviving author plus 70 years.
I definitely didn't pull it out of my anything.
I took it from this website.
http://www.copyright.cornell.edu/public_domain/
However, I just noticed that I took if from the "sound recordings" section of the site. In fact, this is not a sound recording, so I should have looked at one of the previous sections, "Works first published inside the US." For works published after 2002, it is 70 years after the death of the author, or 95 years after first publication for "corporate works". As a corporate work, that makes Apple's software 95 years after publication.
Patents and copyrights are two entirely different things.
I agree with you entirely.
I was trying to refute a previous poster whom I was quoting, who had implied that all that would be necessary to get around any patents on multitouch would be to "change the code" a little bit. Preventing verbatim copying of source code is, as I said, perfectly protected by copyright. The claims in a patent are more general, providing greater protection. It is plausible that many different permutations of source code might, upon inspection, all end up being covered by essentially the same claim in a patent.
For example, here is one of the claims in one of the Fingerworks (whose assets now belong to Apple) patent applications:
United States Patent Application 20070070050 said:
1. A method for extracting multiple degrees of freedom of hand motion from successive proximity images, the method comprising: tracking a plurality of contacts associated with a plurality of hand parts across the successive proximity images; finding an innermost finger contact and an outermost finger contact for a given hand from the plurality of contacts; computing a scaling velocity component from a change in a distance between the innermost and outermost finger contacts; and transmitting the computed scaling velocity component as a control signal to an electronic or electromechanical device.
The claim, if found to be valid, would claim ownership of all implementations, no matter what permutation of source code is used, that has the effect of tracking the rate of change in length and direction of an imaginary line drawn between the innermost and outermost finger contacts as they move through successive snapshots taken by a proximity sensor.