I just watched an old KFC training video from the 70s on how to do it.
What they do is brown the chicken in the open for a bit then put the cover on to pressure cook it for 10 minutes or so.
Barb if you are reading this I have no intention of using up a ton of oil to pressure fry chicken in my little canner.
It seems as though C. Sanders used pressure cookers/canners to start out with.