PRLB - Proto Labs inc (PRLB) Q3 2021 Earnings Call Transcript October, 28 2021 05:00 PM Proto Labs Inc. Image source: The Motley Fool. Proto Labs, inc (NYSE: PRLB) Q3 2021 Earnings Call Oct 28, 2021 , 8:30 a.m. ET Operator Continue reading For further details see: Proto Labs, inc (PRLB) Q3 2021 Earnings Call Transcript