Carrier is owned by United Technologies, not Uniden or American-Standard. Bard is a family owned business not related to anybody. Bryant is part of the United Technologies family as is Heil. Kenmore is the same as a Tempstar. Whirlpool is a private label of Watsco Distributing made by Armstrong. Centurion is a private label made by York.
I know that Carrier is made by A.S. and Janitrol by Goodman. I have also heard that there is a connection between Bard and Bryant and Heil and Whirlpool/Kenmore?