In a recent discovery dispute in a patent infringement case, the district court denied the defendant’s motion to compel the plaintiff to produce certain inventor emails that were withheld on the basis of the work product doctrine. The key issue was whether the plaintiff demonstrated that the emails, exchanged between the two inventors of the asserted patents from 2016-2018, were prepared in anticipation of litigation. The litigation ultimately commenced in February 2022.
The district court acknowledged that evidence pointed to by both sides benefitted their respective positions–the defendant highlighted facts suggesting the inventors’ work was not in anticipation of litigation, while the plaintiff provided contrary evidence. Ultimately, the district court found the plaintiff’s showing sufficient to meet its burden and justify the work product protection.
Key evidence cited by the district court included:
- An inventor’s testimony that he began investigating potential infringement in November 2015 with the assistance of outside counsel.
- The inventor provided information to outside counsel from 2016-2020 to assess possible infringement.
- Starting November 2015, the inventor implemented measures to preserve documents related to the patents and defendant.
- Testimony from the outside attorney that he had previously advised the plaintiff about potential litigation involving the patents at issue.