Unknown manufacturer (3)

Advanced Tactics (1)

AgustaWestland (1)

American Sportscopter (5)

Bell (1)

Bendix (6)

Boeing (1)

Brantly (2)

Capital (1)

Composite FX (7)

Daniel MacPherson (1)

de Bothezat (1)

de Lackner (1)

DeGraw R. (1)

Eagle R&D (1)

Eagle's Perch (2)

Enstrom (15)

Erickson (1)

Fairchild Hiller (1)

Firestone (1)

Forington B. (2)

Fuchs M. (1)

Galaxie (1)

Gerard P. Herrick (3)

Glenview (1)

Haig - K (1)

Helicopter Engineering (2)

Helowerks (2)

HERC (1)

Higgins (1)

Hillberg D. (1)

Hiller (1)

Hiller Aircraft (1)

Hillman (1)

Hoppi-Copters (4)

Hughes (8)

Hughes (2)

Hugues (1)

Humming Bird (2)

Jensen (1)

Jovair (1)

Kaiser-Fleetwings (1)

Kaman (1)

Kellett (4)

Kinney (1)

Landgraf (1)

LuminatiVTOL (1)

Mariano Codorniu (1)

McDonnell (1)

MD (7)

Mike Meger (1)

Millenium Helicopters (1)

Murray A. (2)

Nagler (1)

Nemeth (1)

Nolan Herb (1)

PAS (1)

Pawnee (1)

Pegasus (1)

Phoenix RotorCraft (2)

Robinson (14)

Rotor X (1)

RotorWay (3)

Safari Helicopter (1)

Scheutzow (2)

Schweizer (2)

Schweizer RSG (3)

Scion (2)

Seibel (2)

Sikorsky (4)

Star Aviation (2)

United Helicopters (2)

VAT (2)

West R. (1)