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On April 17, 2018, the Federal Circuit affirmed the PTAB's finding that patent owner failed to sufficiently corroborate inventor's testimony of conception. Apator Miitors APS v. Kamstrup A/S, No. 2017-1681 (Fed. Cir. Apr. 17, 2018) (Moore, J.). Kamstrup filed an IPR and Board instituted based in part on Nielsen. During trial, Apator attempted to swear behind Nielsen's effective filing date by proffering a declaration from the inventor. PTAB found that the only evidence of an earlier conception date was the inventor's declaration and that "mere unsupported evidence of the alleged inventor, on an issue of priority" was insufficient proof of prior conception. Based on its finding, the PTAB found the claims to be unpatentable in view of Nielsen reference. On appeal, the Federal Circuit, a panel consisting of Judges Moore, Linn and Chen, affirmed finding that substantial evidence supported the PTAB's finding. The Court reasoned that Apator failed to meet its burden of proof because the email evidence provided to support an earlier conception date failed to indicate that a file relating to the invention was attached.
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