Winston & Strawn's intellectual property litigation team assumes that every patent case will see the inside of a courtroom, so it never stops digging for evidence and honing each case. That's because the Chicago-based firm's litigation roots were already deeply planted when it started picking up patent cases during the 1970s and 1980s, according to intellectual property practice chairman George Lombardi.

"All the decisions we make in a case are based on trying to come up with theories for and useful information for trial," he said.