Pong-like Games and Sequels (1974)

Wipe Out (1974) - Ramtek

Rebound (1974) - Atari

Super Pong dedicated console - Atari 

Quadrapong - Atari (released as Elimination by Kee Games)

Sources:

"Arcade Wipe Out (1973?/74? Ramtek)" Youtube, uploaded by Old Classic Retro Gaming, https://www.youtube.com/watch?v=K_TmOD0IHFM

"Atari Super Pong Game Console" TheGameConsole.com http://www.thegameconsole.com/atari-super-pong/

"Quadrapong" Old-computers.com, http://www.old-computers.com/museum/software_detail.asp?id=423

"Rebound" Old-computers.com, http://www.old-computers.com/museum/software_detail.asp?st=2&c=1254&id=446