Bingo. When Warner bought Atari, and then sold it to the Commodore guys, they didn't want the arcade division, so Warner kept it and it became Atari Games.
Atari Games was owned by Warner for awhile and had a couple name changes, then Midway bought them, changed their name AGAIN a couple few times then finally closed them down.
Atari Corp. chugged on through the computers, 7800, Lynx and Jag before they finally were absorbed by JTS. Their intellectual properties were bought by Hasbro, and then sold to the French publisher Infogrames, who decided that they liked the Atari name so much they changed their name to Atari!
That's why you get Atari games on the "Midway Treasures" discs and only home games on anything that actually carries the Atari logo.