The Symbolics intellectual property wasn't a legal minefield until the past decade and change, where it was acquired from Andrew Topping's estate by a longtime

The Symbolics intellectual property wasn't a legal minefield until the past decade and change, where it was acquired from Andrew Topping's estate by a longtime MIT Lisp guy who has been a complete idiot for not opening it up to the world. However, he only actually owns it if Andrew Topping actually paid the Symbolics bankruptcy executor for it in full. (Not doing so would entirely fit Topping's character, based on his criminal rap sheet.) If Topping didn't fully pay for it, then it still belongs to whoever or whatever the successor of the Symbolics bankruptcy executor is; I think that was ABN AMRO. Good luck finding any of that out!