FSS - Federal Signal Corp (FSS) Q2 2021 Earnings Call Transcript July, 29 2021 09:32 PM Federal Signal Corporation Image source: The Motley Fool. Federal Signal Corp (NYSE: FSS) Q2 2021 Earnings Call Jul 29, 2021 , 10:00 a.m. ET Operator Continue reading For further details see: Federal Signal Corp (FSS) Q2 2021 Earnings Call Transcript