In the law firms K&L Gates LLP elected Brian J. Arnold, Robert J. Barz, Molly K. McGinley and Amanda S. Williamson to partner. Arnold, Barz and Williamson all focus on intellectual property litigation while McGinley’s practice concentrates on securities and transactional litigation.• Barry F. Irwin has formed his own intellectual property boutique firm, Irwin IP LLC, at 1333 Burr Ridge Parkway, Burr Ridge. Irwin can be contacted at (630) 756-3101, birwin@irwinip.com or irwinip.com. He was …