Important acquisitions include Berliner-Joyce 
                (1930) and General Aviation (1933).  The U.S. Navy used the 
                letter "J" to identify Berliner-Joyce aircraft and continued its 
                use for North American aircraft.
                The acquisition of these companies marked a 
                transition from earning income from stock trading and dividends 
                to designing and manufacturing aircraft.  Also important was the 
                acquisition of "Dutch" Kindelberger as president and general 
                manager.  "Dutch" had been a Lieutenant in the U.S. Army Signal 
                Corp, a draftsman for Glenn Martin and chief engineer for Donald 
                Douglas.
                North American's second aircraft was the 
                aircraft that became the AT-6 Texan, of which over 16,000 were 
                produced.  The Texan, B-25 Mitchell and, P-51 Mustang assured 
                the success of the company.
                North American Aviation merged with 
                Rockwell-Standard (owner of Aero Commander) in 1967 to become 
                North American Rockwell.  Another merger, this time with 
                Rockwell Manufacturing, created Rockwell International in 
                1973.
                Rockwell sold it's General Aviation division 
                to Gulfstream in 1980, its Sabreliner division to Sabreliner 
                Corp in 1983 and the rest of it's aerospace interests to 
                Boeing 
                in 1996.
                Source: www.shanaberger.com