I confirmed these on IPDB.

Paradise - first pinball designed with flipper return lanes, although Bank-A-Ball was produced first
Capersville - first machine to feature 3-ball multiball play (per IPDB though I disagree)
Star-Jet - first machine (in my opinion) to feature 3-ball multiball play, except they called it the extra ball "Blast Off" feature
Hot-Line - electromechanical dot-matrix display
Flipper - first add-a-ball
Wizard - first licensed game ( as noted above)
Fireball - first spinning disc
Hayburners II - first production pin with 3" flippers
*edit*
Dancing Lady - first Gottlieb with auto ball lift, first decagon reels, score card holder with ball in play and game over lights
Baseball - first American game with star rollover button