Medical device patents. The plaintiff and its affiliated entities sued a leading healthcare company for infringement of certain of its patents related to a medical device. Counsel for the defendants retained Dr. Michael Keeley, a senior vice president of Cornerstone Research, to assess potential damages and to respond to the plaintiffs' damages expert's calculations of lost profits and reasonable royalty damages.

In the case involving medical device patents, how did Dr. Michael Keeley, a senior vice president of Cornerstone Research, contribute to the proceedings, and what was the focus of his assessment?