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The owner of the patent, Prometheus Labs, says Mayo is being ridiculous and the patent is no more threatening than similar ones for diagnostic tests for diabetes and HIV.
FORBES: Mayo Clinic Case Asks If A Doctor's Method Can Be Patented
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After waiting for years to obtain a patent, and enduring a difficult path of expensive examination, the patent owner would have to endure still more attacks, without the shield of the clear and convincing evidence standard for protection.
FORBES: Keep the Current Standard for Invalidating a Patent
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Ending patent protection usually requires a law suit, because the patent owner files follow-on patents of lesser merit to extend the patent period, and a court has to decide at what point the incremental patents are invalid.
FORBES: The High Stakes Games Around Generic Lipitor
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The problem is that the PTO has proposed rules for implementing supplemental examination that would require the patent owner to mount an assault in detail on the validity of his own patent.
FORBES: New Patent Regs May Inspire More Litigation, Not Less
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May 5, 2005 - TiVo (and OEM Humax) are named in a patent-infringement lawsuit by EchoStar, owner of Dish Network.
ENGADGET: TiVo Deathwatch