Patents Post Grant Blog

Failure to Focus Means Plus Function Debate in Patent Reexamination

Last week in In re Avid Identification Systems Inc., the CAFC affirmed the USPTO’s rejection of certain claims of U.S. Patent 5,499,017 in ex parte patent reexamination. Of particular note in the appeal was the proper construction of  ”means for storing.” The Patentee argued that the “means for storing” language invoked 35 U.S.C. § 112 6th paragraph (now known as 35 U.S.C. § 112(f)), and as such, required particular structure of the specification. The USPTO took the position that, since this claim construction position was not seasonably raised in the briefing to the PTAB, nor was the required claim mapping presented in the opening brief as required by 37 C.F.R. § 41.37(c)(1)(v), that the argument was waived for purposes of appeal.

In a stinging dissent, Judge Clevenger found the PTAB’s practice to be “random” as it relates to the proper examination of means-plus-function (MPF) claims. He was particularly disappointed that the PTO chose to “hide behind” 37 C.F.R. § 41.37(c)(1)(v), labeling such behavior a public detriment. (decision here)

The fact pattern in Avid is troubling on many levels. Not only is such a practice a public detriment as to predictability, but interpreting MPF claims to have a broader scope is arguably an ultra vires action in the context of patent reexamination. And, above all else, a simple rule change would avoid most such issues from reaching the appellate level. Read the rest of this entry »