Pretty sure the T60 was designed and manufactured entirely by Lenovo but they had permission to use the IBM logo on it.
Nobody makes laptops like IBM used to :-( I know they seem to strongly prefer low-volume high-margin industries but I really would like to see what they could do today.
And everything apart from the keyboard was solid too. How many non-Macbooks can be picked up by any edge or corner? How many laptops have a metal hinge for the screen? A magnesium rollcage inside? Clever drains that divert water out of your keyboard and out holes on the bottom, all without damaging the electronics? Easily user-accessible battery, RAM, HDD…even more advanced components like the screen and the wifi card?