Mealey's (January 27, 2020, 1:15 PM EST) -- WILMINGTON, Del. — Gilead Sciences Inc. (GSI) fired back at the government on Jan. 23, telling a federal judge in Delaware that not only does it not infringe four patents owned by the U.S. Department of Health and Human Services (HHS) but also that the patents in suit are unenforceable in light of the government’s unclean hands (The United States v. Gilead Sciences Inc., et al., No. 19-2103, D. Del.)....