Admissibility of Expert Testimony: Patent Law v. Federal Rules of Evidence
Judge Young recently wrote a colorful and entertaining decision addressing a “disconnect between the Federal Rules of Evidence and the substantive doctrines of patent law [that] seems to have gone totally unremarked both by the patent bar and evidence scholars.” In the end, Judge Young ruled that the patent laws on obviousness trump the Federal Rules of Evidence. NewRiver, Inc. v. Newkirk Products, Inc., C.A. No. 06-12146-WGY, Memorandum & Order (D. Mass. Dec. 16, 2009).
Plaintiff NewRiver brought a patent infringement action against the defendant Newkirk. After trial, the jury returned a verdict finding that Newkirk infringed claims 9-11 but that certain claims of the patent in suit, including the infringed claims 9-11, were invalid as obvious. The parties then filed various post trial motions including two filed by NewRiver: (1) a motion for judgment as matter of law that claims 9-11 are valid and not obvious; and (2) a motion for a new trial.
The Court reviewed the sufficiency of the evidence regarding the invalidity of claims 9-11, and found that evidence “sparse.” Indeed, the only evidence of invalidity of claims 9-11 consisted of the defendant’s expert reading the claim into evidence and concluding that the claims would have been obvious to a person skilled in the art. The expert did not identify any prior art, did not show where the limitations of the claims were in the prior art, or how the combined prior art references made the claims obvious. NewRiver did not object, and the issue of invalidity of claims 9-11 went to the jury with the only evidence being the expert’s unsupported opinion.