Plaintiffs filed a patent infringement action against National Semiconductor Corporation alleging that National Semiconductor’s WEBENCH tools infringed plaintiff’s’ patent. National Semiconductor filed an amended answer and counterclaim asserting, among other things, that plaintiffs patent was invalid due to inequitable conduct based on plaintiffs’ failure to disclose material information about WEBENCH and other third-party tools to the Patent and Trademark Office (“PTO”) during prosecution of the patent-in-suit.
National Semiconductor filed a motion to compel after, as it alleged, plaintiffs disclosed only certain privileged information that it considered helpful to its position during the deposition of individuals involved in the prosecution of the patent. Two of the inventors testified that they understood and complied with the duty of candor and one of the inventors testified that he relied on the advice of counsel. In addition, one of the prosecutors testified that he acted in good faith before the PTO. Other than disclosing this information, plaintiffs instructed the witnesses not to answer based on the attorney-client privilege, including, for example, whether one of the inventors provided patent counsel with documents such as prior art references.
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