Patent reissue allows a patentee to correct a wide variety of errors in an issued patent if the error renders the patent partially or wholly inoperative or invalid. In the last five years, Finnegan has handled more than 100 patent reissue proceedings. Filing a reissue has associated risks and limitations, especially when attempting to broaden patent claims. Finnegan attorneys have extensive experience in mapping out a course of action in view of those inherent risks and limitations. We regularly counsel patent owners through the thicket of reissue challenges to achieve a cost-effective strategy that meets the goals for not only the patent at issue but also the client’s portfolio as a whole.