http://www.nightclub.com/magazine/October98/specialads.html

The name of the machines is "Touchmaster 5000".

http://www.casbox.com/Stinger/Sting29.html
http://www.casbox.com/Stinger/Sting31.html
The former has a bit of info regarding the touch-screen technology and how Midway acquired the license; the latter names more companies that went into that business, including Incredible Technologies [I thought they were dead!]

Note that these games are NOT gambling games, though they do have elements of chance... so they should be added to MAME eventually.

http://www.cen.uiuc.edu/~nshin/INFO/resume.html
The resume of Nick Shin, who worked on some of these games. The board is apparently called "Dolphin".

I find it odd ... these games are NOT that rare; why have they been overlooked for so long?