(This list is most likely not complete, but these are brands that I have either, worked on, or have researched the ownership of online.)
Whirlpool - KitchenAid, Roper, Inglis, Maytag, Magic Chef, Jenn Air, Speed Queen, Amana, Norge, Crosley, Danby, Estate, Consul, Bauknecht, Gladiator
AB Electrolux - Electorlux, Frigidaire, White-Westinghouse, Kelvinator, Gibson, Tappan, Philco, Arctic Air
GE - Ge, Hotpoint, Rca
LG Lucky, Goldstar, LG
Samsung - Samsung
Kenmore - Kenmore (SEARS) makes Nothing
BSH Home Appliances - Bosch, Gaggenau, and Thermador.
Fischer & Paykel - Fischer & Paykel
Who makes Who:
(Some companies may have multiple manufactures of different appliance types, or the same appliance type throughout the years)
This is based on what I have worked on and the internal parts that are similar....