warning systems, automatic flight control systems, and weight and balance systems. The earliest for a HUD dates to 1972 when he was with United Controls. The latest, for a cabin depressurization warning system, dates to 2008 with Honeywell. The primary GPWS patent, Aircraft landing approach ground proximity warning system dates to 1976, with Sundstrand Data. Abstract: “In order to provide for the additional effectiveness of a ground proximity warning system during a landing approach, the waypoint signal of an Area Navigation System is used in combination with an altitude above-ground-signal to compute a minimum terrain altitude for each point along the aircraft's approach to the runway. The minimum altitude is compared with the aircraft's actual altitude and if it is below the minimum an alarm is activated.” References Phoenix: Honeywell's Don Bateman, inventor of EGPWS, to be inducted into national inventors hall of fame 11 February 2005 FreshNews.com Bateman, D. C. (1 July 2001). "An engineer looks at innovation: How a small team of self-styled mavericks tackled the aviation industry’s top cause of fatal accidents." IRI Achievement Award Address, 44(4), 25-27. Bateman, D. C. (1975). In Sundstrand Data Control, Inc. (Redmond, WA) (Ed.), Aircraft landing approach ground proximity warning system Honeywell EGPWS Deliveries Reach 30,000 Units (19 July 2004) Business Wire "National Inventors Hall of Fame announces 2005 inductees" 12 February 2005 Medical News Today Retrieved 28 March 2009 Gary Webb "Garuda crash lawsuit finally settled" (25 September 2003) Retrieved 28 March 2009 "Hall of Fame Inventor Profile: C. Donald Bateman" Invent.org Retrieved 28 March 2009 Aviation pioneers People from Saskatchewan Canadian inventors 1932 births Living people