- Bell/Agusta Aerospace Company
- Manufactures the BA609 tiltrotor aircraft.
- Edwards & Associates
- Specializing in helicopter customization, parts and services.
- Enstrom Helicopter Corporation
- Manufactures piston and turbine powered light helicopters.
- Erickson Air-Crane
- Manufactures a aerial heavy lift helicopter for firefighting, hydromulch application, logging, powerline construction, and logistical support.
- FH1100 Manufacturing Corp.
- Manufactures light turbine powered helicoptors for civil and military use.
- Helicopter Technology Company
- Specializing in helicopter rotor blades, tool design and fabrication and testing.
- MD Helicopters, Inc.
- Manufactures a light helicopter for public service, emergency medical service, corporate, utilities, military, offshore oil and private owners.
- Piasecki Aircraft Corporation
- A research and development company focusing on the advancement of aviation and rotorcraft.
- Precision Helicopters
- Offering helicopter rental, charter, pilot training and rides in Cleveland, Ohio.
- Seaside Helicopters, Inc.
- Specializes in full support of the MD 500 and 600 series helicopters and maintains a large inventory of turbine helicopter parts and overhauled components.
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