[1] Larson invented an inflatable gyrocopter parachute that was featured in Popular Mechanics.

In 1916 Harold Pitcairn attended an apprenticeship at Curtiss Aeroplane and Motor Company, becoming friends with Larsen.

[3] In 1925 Larsen and Pitcairn approached Cierva about licensing autogiro technology.

[5] In 1930, Larsen won the Collier Trophy along with Pitcairn for the work on autogiro technology.

[1] Greg Larsen, Agnew E. Larson's grandson is a business development manager for the Hagerstown, MD, Regional Airport founding Pittsburgh Institute of Aeronautics school for aircraft technicians.