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[dammy]

Originally Posted by cgutjahr

The USPTO has a nice searchable patent database (use "quick search" then search for "Assignee name" = Commodore). The list of results is sorted chronologically. start at the bottom and then go up the list.

For somewhat complicated reasons, the patents in question expire either 17 years after the issue date or 20 years after the filing date - whatever is the longer term. I count 6 patents which are still active, all of which will expire in the next year.

But the copyrights last nearly forever: http://www.copyright.gov/help/faq/faq-duration.html