What Sachen titles have copyrights of 1989/1990? The reason I ask is as follows. When American Video Entertainment did their dealings with Sachen, Sachen had always sent them Famicom games to play/review and then AVE would decide what to buy the rights for/publish from there.
If Sachen was making 72 pin games at this point, why would they send American Video the 60 pin Famicom games? The guys at AVE probably didn't want to deal with designing a Famicom adapter (yes, they did make their own adapters...) but they had to since they didn't receive 72 pin versions of the Sachen games.
Also, I don't really classify the Paneasian titles as US releases, although many people do. I have different thoughts on Cheetahmen II though.