 Plymouth, Massachusetts--Newsfile Corp. - September 21, 2021 - Plymouth Rock Technologies Inc. CSE: PRT OTCQB: PLRTF FSE: 4XA WKN A2N8RH Plymouth Rock, PRT, or the Company, a leader in developing detection apparatus and unmanned technologies, is pleased to announce the sale of custom drones and training services to Cranfield University in collaboration with the UK Civil Aviation Authority CAA National Beyond Visual Line of Sight Experimentation Corridor NBEC.The goal of the NBEC is to provide... 