This is a Significant People milestone.
Glidden (Glid) Doman was an early pioneer in the rotorcraft industry. Amongst his many achievements, he was responsible for a highly innovative design for rotor heads described in the following reference,
Ref: American Helicopter Development, FLIGHT, February 5th 1948, Page 155
An excellent history of Doman helicopters is provided in an early AHS Journal paper,
Ref: History of Doman Helicopters, Inc., Stephen du Pont and Giles Montgomery, Journal of the American Helicopter Society, Vol. 1, No. 1, January 1956, Page 64
Source: "AHS Mourns the Loss of Glid Doman, Last Helicopter Pioneer", AHS website, June 09 2016