Only manufactueres with 3 or more aircraft registered are listed.
U-fly-it Light Sport Acft Llc (8)
U. S. Inc (4)
UFM (55)
UPM (6)
Udet (11)
Uetz (14)
Ulico Manufacturing (11)
Ultimate (19)
Ultra Magic (162)
Ultra Magic Sa (69)
Ultra Sports Ltd (9)
UltraMagic (606)
Ultracraft (20)
Ultraflight Ltd (4)
Ultralight (11)
Ultralight Air (5)
Ultralight Concept (13)
Ultralight Flight (30)
Ultralight Unknown (65)
Ultralite Soaring (26)
Ultravia (199)
Umbaugh (3)
Unicorn Group (24)
United Aircraft of Canada (11)
Universal (62)
Universal Moulded Products (20)
Universal Stinson (225)
Unknown (7)
Urban Air (81)
Urmston (5)
Utva (42)