 The nation's largest radio sponsor, Procter & Gamble, and one of its most powerful radio stations, WLW, were based there.Ziv and writer John L. Sinn, who later became his business partner and son-in-law, founded the Frederick W. Ziv Company.They produced pre-recorded radio shows such as "Boston Blackie" and "The Cisco Kid" and occasionally bought old shows for new syndicated rerun broadcast.