- Advanced Telescope Systems Inc
- Apogee Inc
- Apogee Inc
- Astro Systems Inc
- Astro-Physics Inc
- Baize Electronics
- Clement Focuser
- Collins Electro Optics
- Collins Electro Optics
- Coronado Instruments LTD
- Coulter Optical Co
- Discovery Telescopes
- Discovery Telescopes
- EOS Technologies
- Equinox Interscience Inc
- Galaxy Optics
- Galileo Optics
- Glass Eye/Sight Instruments
- Gordon P Mills Co
- Hutech Corp
- Mountain Instruments
- Mountain Instruments
- Oceanside Photo & Telescope
- Orion Telescope Ctr
- Photon Instruments LTD
- R E Musser & Sons
- Ritz Camera Ctr
- Scope City
- Scope City
- Scope City
- Scopetronix
- Sky Works
- Skyscopes Space Toys
- Space Systems
- Starizona
- Starmaster
- Stellar Vision & Astronomy
- Stellarvue
- Tangent Instruments Inc
- Telescope Engineering Co
- Universal Windows
- Wholesale Optics
