Fed. Circ. Says Eon TV Patent Indefinite, Backs AT&T, Others

Law360, New York (May 6, 2015, 4:56 PM EDT) -- The Federal Circuit on Wednesday affirmed that an Eon Corp. IP Holdings LLC interactive TV patent asserted against AT&T Mobility LLC, HTC America Inc. and others is invalid as indefinite because it does not include an algorithm for how it performs the claimed software functions.

The appeals court upheld a Delaware judge's 2014 decision that Eon's software patent includes so-called "means-plus-function" claims that are generally indefinite unless they include an algorithm. The appeals court rejected Eon's claim that its patent falls within a narrow exception to that rule.

"The district court made explicit factual findings, based on expert testimony, that each...

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