35 U.S.C. § 112, ¶6 is not invoked, in the absence of reciting the term “means”, if those skilled in the art understand the structural significance of the claim language. Also, in means-plus-function claims, even if a disputed term is not limited to a single structure, the disputed term is not disqualified as a corresponding structure as long as a class of structures is identifiable by a skilled artisan.