O'Neal Construction, 1971 Year 1971 Month April Day 1 Rights Held By Ann Arbor District Library Copyright Creative Commons (Attribution, Non-Commercial, Share-alike) Ann Arbor Historical Signs Photo Subjects Lenz Company Filter Division Michigan Testing Engineers Inc. Building & Construction Research & Industrial Parks Manufacturing O'Neal Construction Nevins: Electronic Service Center Businesses Offices Signs & Signage Ann Arbor Historical Signs 1342 N. Main St