The U.S. Court of Appeals for the Federal Circuit May 23 affirmed a Patent Trial and Appeal Board decision finding that Papst Licensing GMBH & Co.'s patent was invalid because it was covered by other patented technology and published research.
Papst was precluded from challenging the PTAB decision on U.S. Patent No. 9,189,437 because it had previously lost on review challenges, known as an inter partes review, of two related patents based on the same prior invention, the Federal Circuit...
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(Updated with additional reporting throughout.)