The U.S. Court of Appeals for the Federal Circuit affirmed the PTAB's decision invalidating Shockwave Medical's patent claims due to obviousness. The PTAB used applicant admitted prior art, which provided background knowledge without being the sole basis for its ruling. The case involved a dispute over the Shockwave Balloon Catheter System that utilized lithotripsy techniques for patients. The PTAB agreed with Cardiovascular Systems' argument that modifications to existing inventions, including a European application on laser technology, rendered the claims obvious.
The Federal Circuit found the PTAB's ruling consistent with its own case law on AAPA, which provided general background knowledge for a person of ordinary skill in the art without serving as the sole basis for the PTAB's obviousness finding.
Shockwave Medical's patent claims were challenged based on a European patent application discussing laser-generated pulses to disintegrate blood vessel plaque, leading to findings of obviousness.
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