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OAK BROOK, ILL. — Federal Signal has signed a lease renewal for its 17,282-square-foot office in Oak Brook Regency Towers in Oak Brook, a suburb of Chicago. Federal Signal is a designer and manufacturer of products and solutions that serve municipal, government, industrial and institutional customers and has been headquartered at the property for more than 25 years. Patrick Kiefer, executive director with NAI Hiffman’s office services group, represented the landlord, American Realty Advisors, in the transaction. Jeff Liljeberg of Jones Lang LaSalle represented Federal Signal.