• Presumption of Patent Scope
  • March 19, 2013
  • Law Firm: Reising Ethington P.C. - Troy Office
  • The presence or absense of "means for" in a patent claim determines whether there is a presumption that equivalents of elements claimed are limited to those equivalents cited in the patent specification or whether a presumption exists that a broader class of equivalents can be considered via invoking the doctrine of equivalents. This presumption can be overcome, but to do so is difficult.