Duane C. Marks is patent counsel at Eli Lilly and Company overseeing IP strategy and procurement for biomolecule assets. Before joining Lilly, he served as patent counsel for Roche Diagnostics where his responsibilities included diagnostic, molecular marker, companion diagnostic and sequencing assets. He holds a BS in biology and chemistry, a MS in biological sciences, and is a summa cum laude graduate of Indiana University McKinney School of Law. He has lectured nationally and internationally on topics including subject matter eligibility, written description, the safe harbour of §271(e)(1), and the doctrine of equivalents.