Specialized
Raleigh
Cannondale
Surly
Novara
Motobecane
Trek (most of them)
Kona
Schwinn
Mongoose
GT
Masi
Bianchi
Rivendell

Old School:

Nishiki
Lotus
Univega
Fisher

Name one of the above that actually makes most of their own bikes. They don't. They get their stuff from Taiwan or China and put their own stickers on them. It is WAY too late to start caring.