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Interstate Aircraft and Engineering CorporationAmerika SerikatIPEBrasil
Iran Aviation Industries OrganizationIran
Israel Aerospace IndustriesIsrael
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Kawasaki Aerospace CompanyJepang
Kellett Autogiro CorporationAmerika Serikat
Keystone AircraftAmerika SerikatKomsomolsk-on-Amur Aircraft Production AssociationRusia
Korea Aerospace IndustriesKorea Selatan
Lancair1981LavochkinUni Soviet
LeonardoItalia
LetovCeko
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Lockheed CorporationAmerika Serikat
Lockheed MartinAmerika Serikat
Loening Aeronautical Engineering CorporationAmerika Serikat
Loire AviationPrancisLotnicze Warsztaty DoświadczalnePolandia
Luscombe AircraftAmerika SerikatLWFAmerika Serikat
LWSPolandia
Martin-BakerBritania Raya
McDonnell DouglasAmerika Serikat
MD HelicoptersAmerika SerikatMedway MicrolightsBritania Raya
Messerschmitt-Bölkow-BlohmJerman
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