 Plymouth, Massachusetts--Newsfile Corp. - February 24, 2021 - Plymouth Rock Technologies Inc. CSE: PRT OTCQB: PLRTF FSE: 4XA WKN: A2N8RH Plymouth Rock, PRT, or the Company, a leader in developing threat detection and unmanned technologies, is pleased to announce that the PRT XV-S drone has passed more than 20 hours of flight testing.The PRT XV-S is a fixed-wing UAS platform with the added capability of vertical take-off and landing VTOL. This capability removes the... 