Who made cars in the 1930?

In the United Sates alone there was Cadillac, Chrysler, Oldsmobile, Ford, Chevrolet, Pontiac, Lincoln, Mercury, DeSoto, Plymouth, Buick, Nash, Rambler, Studebaker, GMC, Hudson, Cord, Duesenburg, American Austin, Kaiser, Frazer, Pierce-Arrow, Auburn, Marmon, Graham, Franklin, Stutz, Hupmobile, Terraplane, Singer, Stout Scarab, American Bantam, Blackhawk, and more that I may not have listed. All the manufactures produced vehicles in 1930 in the U.S.