He is buried in Medfield Massachusetts:
https://www.findagrave.com/memorial/...robert-h-brown
He was born June 24, 1917 and died December 20, 1975.
According to his headstone application on Ancestry.com, Captain Brown O-1691696 joined the Army Air Forces December 5, 1943 and was released from service on December 15, 1946. (Added later: the December 5 1943 date may be when he was commissioned as an officer, not when he first joined.)
Although these citations for 3 awards (see all 3 pages) give his birthdate as August 19, 1919 his serial number is given as O-1691696 which is also on the headstone application. They also give his hometown as Medfield, MA, which also agrees with the headstone application.
https://valor.militarytimes.com/hero/45986