" but he wants MAJOR recognition that it was HIS before & because of being able to run off his already established business, he wants compensation!"

and he is absolutely correct in this thinking.

he ran the business without you for 12plus years, if i remember the timeline correctly. he created the company and kept it running. only recently (in the overall timeline) did you come and change the name and add in your time.

mathematically he ran the company for 12/20 years, thats 60% and was 1/2 owner for the remaining time = 20%, and likewise you were half owner for 20%.

If i were to divide up the company fairly, i'd give him 80% and you 20%.

"In a ham and eggs breakfast, the hen is involved, but the pig is committed".