Thornton, William2018-02-132018-02-131979-09-20http://hdl.handle.net/2152.3/5673This image reflects a letter written by William Thornton while working as a consultant to Avionics Research Products regarding Comments on the 1981 Blood Pressure Data System.Bruce Del MarR.I. CherryDave SquiresBlood Pressure Data SystemBlood Pressure MonitorUTMBJohn WallaceAvionics Research Products