The Federal Circuit Court of Appeals affirmed the Patent Trial and Appeal Board's determination that a patent specification did not provide written description support for range limitations in the ...

In a recent series of cases, the Court of Appeals for the Federal Circuit (CAFC) evaluated whether examples in a patent specification will support infringement of alternative embodiments. Two recent ...

Patent claim limitations that are “negative”—that is, claim limitations specifying the absence of a particular element from the patent claim—can pose a dilemma in the written description context. How ...

EDITOR’S NOTE: This article is an excerpt from Rules of Patent Drafting: Guidance from Federal Circuit Cases, 2014 Edition, which is now available at Amazon.com. This is the sixth installment of this ...