What is bakery pantent flour? What kind of bread uses patent flour?
Patent flour is made from the endosperm of the wheat berry and has the least amount of bran in it according several sources. The Hudson Cream flours from Kansas declares that all its white flours, bleached and unbleached, are "short patent". Based on this, I suspect that most of the other mass market brands of white flour are patent flour also.
I don't know the technical meaning of patent flour, but I just ordered durum patent flour from NY Bakers to use in sourdough semolina breads, a favorite of ours. It looks lovely.