I went through all of my All-Star cards to check for the trademark and didn't find any variations. Seems like Franco, Puckett, Boggs, Bo Jackson, and Baines are all missing the trademark on the front of their cards. I didn't find a single copy of any of those that had a trademark. I didn't find a single copy of any other All-Star card that was missing a trademark.
That's not to say that the variation doesn't exist but it would be a legitimately rare variation if it does. I'll certainly keep looking.
Does anyone have the #18 Howard Johnson Diamond King with the line on front corner and the full number on the back. I am willing to buy that card from you. Me and my father spent three weeks going through all of our 1990 donruss to put a complete Master set with every error and variation in it. But that is the last card for a set. Hopefully someone has it here.