Preserving Rights Through Trademarks When Copyrights Expire

In their Intellectual Property Litigation column, Lewis R. Clayton and Lynn B. Bayard, partners at Paul, Weiss, Rifkind, Wharton & Garrison, review recent decisions involving the relationship of patent law's "vitiation" test to the "doctrine of equivalents" theory of infringement, commercial-skipping DVR features, a vulgar lollipop, and more.

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