Plaintiff McKesson Information Solutions, Inc. ("McKesson") appeals the final decision of the United States District Court for the Eastern District of California dismissing McKesson's infringement suit against defendant Bridge Medical, Inc. ("Bridge") after the court found the only patent at issue, U.S. Patent No. 4,857,716 ("the '716 patent"), unenforceable due to inequitable conduct.
As set forth in considerable detail below, this case involves McKesson's nondisclosure of three items of information during prosecution of the '716 patent in a setting where the applicant had co-pending applications. The district court found each of the three nondisclosures individually and collectively material to prosecution of the application that led to the '716 patent. With regard to deceptive intent regarding each nondisclosure, the district court found circumstantial evidence strongly supports an inference of deceptive intent. After assessing all the facts, the district court held that McKesson failed to provide a credible explanation for the material nondisclosures. As the district court noted, this was not a case of mistake or negligence—the prosecuting attorney testified that he would make all the same nondisclosure decisions again if prosecuting the same applications today.
The district court's thorough written opinion documents the court's correct understanding and application of the relevant precedent. The issues of materiality and intent are fact-driven. With regard to the issue of intent, the law recognizes that deceptive intent is virtually never shown or disproved by direct evidence. Instead, the ultimate fact finding on the issue depends on assessment of all the inferences, favorable and unfavorable, that can be drawn from pertinent evidence. To prevail on appeal, McKesson must demonstrate that the district court's findings of fact are clearly erroneous. After careful review of the record, we conclude that McKesson has not met its burden, and we therefore affirm.
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