PRLB - Proto Labs (PRLB) Q4 2021 Earnings Call Transcript February, 11 2022 02:30 PM Proto Labs Inc. Image source: The Motley Fool. Proto Labs (NYSE: PRLB) Q4 2021 Earnings Call Feb 11, 2022 , 8:30 a.m. ET Operator Continue reading For further details see: Proto Labs (PRLB) Q4 2021 Earnings Call Transcript