Fitch, Even, Tabin & Flannery

The firm originated in Chicago, Illinois in 1859, and now has offices throughout the United States and an international client base.

[citation needed] Most of the firm's attorneys are registered U.S. patent attorneys (i.e., authorized to practice before the U.S. Patent and Trademark Office and in at least one state in the U.S.) and have backgrounds in high technology or the chemical and life sciences.

[1] Fitch Even's litigation practice involves all areas of IP including patent, trade secret, trademark, copyright, unfair competition, and related commercial disputes.

[2][3] The firm successfully argued that a software-based mathematical method used in monitoring a patient's heart was patentable subject matter.

[4] The Federal Circuit relied on Arrhythmia in a subsequent case, State Street Bank v. Signature Financial Group, that expanded patentable subject matter to include business methods.