Dukes
- Develops and distributes FAA approved products for aircraft bleed air, fuel, and cabin pressurization systems. Located in Northridge, California USA.
- http://www.dukesaerospace.com

Arai Design
- Manufacturer of the Tangent Flight Computer. Located in Healdsburg, California USA.
- http://www.araidesign.com/

Bräuniger Flugelectronic
- Flight instruments and accessories for paragliders, hang gliders and ultralight aircraft. Located in Weilheim, Germany. [In German and English]
- http://www.braeuniger-flugelectronic.de/

Precision Dial
- Offering refinishment, repairs, and manufacturering of dials, data-plates, instrument panels. Based in Kalamazoo, Michigan USA.
- http://www.precisiondial.com

Kelly Aviation
- Providing sales of a cabin pressure altitude monitor and warning system. Based in Grenola, Kansas USA.
- http://kellyaviation.com

Berkshire Instrument
- Providing aircraft instrument sales and service. Based in Montrose, Colorado, United States.
- http://www.berkshireinstrument.com

Aero Northwest
- Designs and manufactures custom lighted and unlighted aircraft instrument panels and electronic switch controls. Based in Newcastle, Washington, United States.
- http://www.aeronorthwest.com