Quoted from LTG:When figuring in the costs. Think if you need to invent everything from the ground up. Or can you use existing parts like flipper mechs and stuff. You start using a different manufacture's licensed parts in a game you are selling, you'll need their okay to use them.
LTG : )
Why not use existing generic non-branded parts that are beyond the patent term? Most pinball parts that were patented for the 80's-90's games no longer have live patents. PPS does not deserve anything for those parts being used unless the game manufacturer feels some need to have the association with the old pinball companies in their marketing.