United Aircraft & Transport Corp.
28> Boeing, Pratt & Whitney, Vought formed UATC
29> Hamilton Metalplane, Sikorsky, Stearman
34> United Aircraft Corp. (Vought, Sikorsky)
Boeing/Stearman subsidiary
3506> United Aircraft Mfg. Corp.
750501> United Technologies
??> Northrop Aircraft Corp.
with % of Douglas?
Factory: Hartford, CT