Fenwick & West litigators are hot—and not because it’s July. Firm lawyers have racked up a series of back-to-back wins since the summer solstice, most recently on behalf of Amazon before the U.S. Court of Appeals for the Federal Circuit in a patent suit by Innovation Sciences.

Litigators Dave Hadden, Saina Shamilov, Todd Gregorian and Ravi Ranganath  last week convinced the appellate panel to find one patent related to online payments was invalid, and to affirm that Amazon did not infringe another patent.